Data communication method, terminal device, and network device

ABSTRACT

Embodiments of the present disclosure provide a data communication method, a terminal device, and a network device. In the solution, a terminal device receives first indication information in a first time period; and the terminal device transmits first information in a second time period, where a duration of the first time period is a first time unit, a duration of the second time period is a second time unit, and a duration of the second time unit is greater than a duration of the first time unit. In this way, although the terminal device receives the first indication information in a first time unit N, the terminal device transmits the first information in a second time unit M whose duration is greater than that of the first time unit.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Patent ApplicationNo. PCT/CN2015/099920, filed on Dec. 30, 2015, the disclosure of whichis hereby incorporated by reference in its entirety.

TECHNICAL FIELD

Embodiments of the present disclosure relate to the field ofcommunications technologies, and in particular, to a data communicationmethod, a terminal device, and a network device.

BACKGROUND

With fast development of wireless communications technologies, usersalso have higher requirements for data transmission rates. An Long TermEvolution (LTE) system can provide a high-rate data network by using ahigh-rate low-delay flat network architecture, so as to satisfy theincreasing rate transmission requirements of the users.

In a current LTE system, a terminal device transmits information to anetwork device in a Transmission Time Interval (TTI) by using an uplinkchannel. The information generally includes data, a reference signal,Channel State Information (CSI) and the like. The CSI includes at leastone of a Precoding Matrix Indicator (PMI) an Rank Indicator (RI) and aChannel Quality Indicator (CQI). The network device performs downlinkscheduling on and downlink information transmission to the terminaldevice according to the CSI transmitted by the terminal device.

In the current LTE system, a duration of the TTI is 1 ms. To achieve ashorter round trip time and a shorter data transmission delay, atechnology for shortening the TTI is put forward. However, when the TTIis shortened, the terminal device does not have sufficient uplinktransmission resources for transmitting the information. Further, thenetwork device cannot obtain the data, the reference signal, or the CSI,and therefore a downlink capacity of the system is reduced.

In conclusion, in a scenario of a short TTI, a case in which the networkdevice cannot receive some information exists in a current method fortransmitting or receiving uplink information, and further, adisadvantage that the system capacity is relatively low is caused.

SUMMARY

Embodiments of the present disclosure provide a data communicationmethod, to resolve a disadvantage of the prior art that a systemcapacity is relatively low.

According to a first aspect, a data communication method is provided andincludes:

receiving, by a terminal device, first indication information in a firsttime period, where a duration of the first time period is a first timeunit, and the first indication information is used to trigger theterminal device to transmit first information in a second time period;and

transmitting, by the terminal device, the first information in thesecond time period according to the first indication information, wherea duration of the second time period is a second time unit, and aduration of the second time unit is greater than a duration of the firsttime unit; where

an interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

With reference to the first aspect, in a first possible implementation,before the transmitting, by the terminal device, the first informationin the second time period according to the first indication information,the method further includes:

receiving, by the terminal device, second indication information, wherethe second indication information is used to trigger the terminal deviceto transmit second information in a third time period, a duration of thethird time period is the first time unit, and at least one part or anentirety of the third time period overlaps the second time period.

With reference to the first possible implementation of the first aspect,in a second possible implementation, the method further includes:

transmitting, by the terminal device, first notification information toa network device, where the first notification information is used tonotify the network device that the terminal device is capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

With reference to the first or the second possible implementation of thefirst aspect, in a third possible implementation, before thetransmitting, by the terminal device, the first information in thesecond time period according to the first indication information, themethod further includes:

receiving, by the terminal device, first configuration informationtransmitted by the network device, where the first configurationinformation is used to configure the terminal device to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

With reference to the first to the third possible implementations of thefirst aspect, in a fourth possible implementation, after the receiving,by the terminal device, second indication information, the methodfurther includes:

determining, by the terminal device, whether a sum of a transmit powerof a first channel carrying the first information and a transmit powerof a second channel carrying the second information is less than orequal to a first threshold, where the first threshold is a maximumtransmit power value allowed by the terminal device; and

if the sum of the transmit power of the first channel carrying the firstinformation and the transmit power of the second channel carrying thesecond information is less than or equal to the first threshold,transmitting the second information in the third time period accordingto the second indication information;

otherwise, stopping transmitting the second information in the thirdtime period; or discarding the second information; or reducing thetransmit power of the second channel carrying the second information,and when determining that a reduction value of the transmit power of thesecond channel is less than a second threshold, using a reduced transmitpower of the second channel to transmit the second information.

With reference to the fourth possible implementation of the firstaspect, in a fifth possible implementation, the method further includes:

if the reduction value of the transmit power of the second channel isgreater than or equal to the second threshold, stopping, by the terminaldevice, transmitting the second information in the third time period, ordiscarding, by the terminal device, the second information, where thesecond threshold is equal to the transmit power of the second channel×T,and a value range of T is (0, 1).

With reference to the first possible implementation of the first aspect,in a sixth possible implementation, the method further includes:

transmitting, by the terminal device, second notification information toa network device, where the second notification information is used tonotify the network device that the terminal device is incapable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

With reference to the first or the sixth possible implementation of thefirst aspect, in a seventh possible implementation, before thetransmitting, by the terminal device, the first information in thesecond time period according to the first indication information, themethod further includes:

receiving, by the terminal device, second configuration information,where the second configuration information is used to configure theterminal device to be incapable of simultaneously transmittinginformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit.

With reference to the first, the sixth, or the seventh possibleimplementation of the first aspect, in an eighth possibleimplementation, after the receiving, by a terminal device, firstindication information in a first time period, the method furtherincludes:

stopping, by the terminal device, transmitting the second information inthe third time period, or discarding, by the terminal device, the secondinformation.

With reference to the fourth to the eighth possible implementations ofthe first aspect, in a ninth possible implementation, after thestopping, by the terminal device, transmitting the second information inthe third time period, or discarding the second information, the methodfurther includes:

transmitting, by the terminal device, the second information in a J^(th)first time period after the second time period, where J is a positiveinteger greater than or equal to 1.

With reference to the first aspect, or the first to the ninth possibleimplementations of the first aspect, in a tenth possible implementation,the receiving, by a terminal device, first indication information in afirst time period includes:

receiving, by the terminal device, the first indication information inthe first time period in a first carrier; and

the transmitting, by the terminal device, the first information in thesecond time period according to the first indication informationincludes:

transmitting, by the terminal device, the first information in thesecond time period in the first carrier or a second carrier.

With reference to the first aspect, or the first to the tenth possibleimplementations of the first aspect, in an eleventh possibleimplementation, the method further includes:

transmitting, by the terminal device, third notification information tothe network device, where the third notification information is used tonotify the network device that the terminal device is capable oftransmitting information in a time period whose duration is the secondtime unit and capable of receiving information in a time period whoseduration is the first time unit.

With reference to the first aspect, or the first to the eleventhpossible implementations of the first aspect, in a twelfth possibleimplementation, the method further includes:

receiving, by the terminal device, third configuration information,where the third configuration information is used to configure theterminal device to be capable of transmitting information in a timeperiod whose duration is the second time unit and capable of receivinginformation in a time period whose duration is the first time unit.

With reference to the twelfth possible implementation of the firstaspect, in a thirteenth possible implementation, after the receiving, bythe terminal device, third configuration information, the method furtherincludes:

receiving, by the terminal device, third information in a time periodwhose duration is the first time unit.

With reference to the first aspect, or the first to the thirteenthpossible implementations of the first aspect, in a fourteenth possibleimplementation, before the transmitting, by the terminal device, thefirst information in the second time period according to the firstindication information, the method further includes:

transmitting, by the terminal device, fourth notification information tothe network device, where the fourth notification information is used tonotify the network device that the terminal device is incapable oftransmitting information in a plurality of uplink carriers.

With reference to the first aspect, or the first to the fourteenthpossible implementations of the first aspect, in a fifteenth possibleimplementation, the method further includes:

receiving, by the terminal device, fourth configuration information,where the fourth configuration information is used to configure theterminal device to be capable of transmitting information in a singleuplink carrier.

With reference to the first aspect, or the first to the fifteenthpossible implementations of the first aspect, in a sixteenth possibleimplementation, the duration of the second time unit is a duration ofone subframe, and the duration of the first time unit is less than orequal to a duration of one timeslot.

With reference to the first aspect, or the first to the sixteenthpossible implementations of the first aspect, in a seventeenth possibleimplementation, the first indication information and the secondindication information include a channel state information CSI reportingrequest and/or time unit switching information.

With reference to the seventeenth possible implementation of the firstaspect, in an eighteenth possible implementation, the CSI reportingrequest includes at least one of CSI reporting time information, CSItype information, or frequency domain information for CSI reporting.

With reference to the seventeenth or the eighteenth possibleimplementation of the first aspect, in a nineteenth possibleimplementation, the time unit switching information includes time unitswitching time information and/or time unit duration switchingindication information.

According to a second aspect, a data communication method is providedand includes:

determining, by a network device, first indication information; and

transmitting, by the network device, the first indication information toa terminal device in a first time period, where a duration of the firsttime period is a first time unit, the first indication information isused to trigger the terminal device to transmit first information in asecond time period, a duration of the second time period is a secondtime unit, and a duration of the second time unit is greater than aduration of the first time unit; where

an interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

With reference to the second aspect, in a first possible implementation,after the transmitting, by the network device, the first indicationinformation to a terminal device in a first time period, the methodfurther includes:

receiving, by the network device, the first information transmitted bythe terminal device in the second time period.

With reference to the first possible implementation of the secondaspect, in a second possible implementation, before the receiving, bythe network device, the first information transmitted by the terminaldevice, the method further includes:

transmitting, by the network device, second indication information tothe terminal device, where the second indication information is used totrigger the terminal device to transmit second information in a thirdtime period, a duration of the third time period is the first time unit,and at least one part or an entirety of the third time period overlapsthe second time period; and

receiving, by the network device, the second information transmitted bythe terminal device in the third time period according to the secondindication information, or the second information transmitted in aJ^(th) first time unit after the second time period, where J is apositive integer greater than or equal to 1.

With reference to the second aspect, or the first to the second possibleimplementations of the second aspect, in a third possibleimplementation, before the transmitting, by the network device, thefirst indication information to a terminal device in a first timeperiod, the method further includes:

receiving, by the network device, first notification informationtransmitted by the terminal device, where the first notificationinformation is used to notify the network device that the terminaldevice is capable of simultaneously transmitting information in a timeperiod whose duration is the first time unit and a time period whoseduration is the second time unit.

With reference to the second to the third possible implementations ofthe second aspect, in a fourth possible implementation, the methodfurther includes:

transmitting, by the network device, first configuration information tothe terminal device, where the first configuration information is usedto configure the terminal device to be capable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit.

With reference to the second aspect, in a fifth possible implementation,the method further includes:

receiving, by the network device, second notification informationtransmitted by the terminal device, where the second notificationinformation is used to notify the network device that the terminaldevice is incapable of simultaneously transmitting information in a timeperiod whose duration is the first time unit and a time period whoseduration is the second time unit.

With reference to the second aspect or the fifth possible implementationof the second aspect, in a sixth possible implementation, the methodfurther includes:

transmitting, by the network device, second configuration information tothe terminal device, where the second configuration information is usedto configure the terminal device to be incapable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit.

With reference to the second aspect, or the first to the sixth possibleimplementations of the second aspect, in a seventh possibleimplementation, the transmitting, by the network device, the firstindication information to a terminal device in a first time periodincludes:

transmitting, by the network device, the first indication information tothe terminal device in the first time period in a first carrier; and

the receiving, by the network device, the first information transmittedby the terminal device in the second time period includes:

receiving, by the network device, the first information in the secondtime period in the first carrier or a second carrier.

With reference to the second aspect, or the first to the seventhpossible implementations of the second aspect, in an eighth possibleimplementation, the method further includes:

receiving, by the network device, third notification informationtransmitted by the terminal device, where the third notificationinformation is used to notify the network device that the terminaldevice is capable of transmitting information in a time period whoseduration is the second time unit and capable of receiving information ina time period whose duration is the first time unit.

With reference to the second aspect, or the first to the eighth possibleimplementations of the second aspect, in a ninth possibleimplementation, the method further includes:

transmitting, by the network device, third configuration information tothe terminal device, where the third configuration information is usedto configure the terminal device to be capable of transmittinginformation in a time period whose duration is the second time unit andcapable of receiving information in a time period whose duration is thefirst time unit.

With reference to the second aspect, or the first to the ninth possibleimplementations of the second aspect, in a tenth possibleimplementation, the method further includes:

transmitting, by the network device, third information in the first timeperiod.

With reference to the second aspect, or the first to the tenth possibleimplementations of the second aspect, in an eleventh possibleimplementation, the method further includes:

receiving, by the network device, fourth notification informationtransmitted by the terminal device, where the fourth notificationinformation is used to notify the network device that the terminaldevice is incapable of transmitting information in a plurality of uplinkcarriers.

With reference to the second aspect, or the first to the eleventhpossible implementations of the second aspect, in a twelfth possibleimplementation, the method further includes:

transmitting, by the network device, fourth configuration information tothe terminal device, where the fourth configuration information is usedto configure the terminal device to be capable of transmittinginformation in a single uplink carrier.

With reference to the second aspect, or the first to the twelfthpossible implementations of the second aspect, in a thirteenth possibleimplementation, the method further includes:

transmitting, by the network device, at least one of first configurationinformation, second configuration information, or third configurationinformation to the terminal device, where the first configurationinformation is used to instruct to configure only one uplink carrier forthe terminal device, the second configuration information is used toinstruct to configure the terminal device to simultaneously transmitinformation in the second time period and the first time period, and thethird configuration information is used to instruct to configure aduration of a time period for receiving information and a duration of atime period for transmitting information by the terminal device to bedifferent.

With reference to the second aspect, or the first to the thirteenthpossible implementations of the second aspect, in a fourteenth possibleimplementation, the duration of the second time unit is a duration ofone subframe, and the duration of the first time unit is less than orequal to a duration of one timeslot.

With reference to the second aspect, or the first to the fourteenthpossible implementations of the second aspect, in a fifteenth possibleimplementation, the first indication information and the secondindication information include a channel state information CSI reportingrequest and/or time unit switching information.

With reference to the fifteenth possible implementation of the secondaspect, in a sixteenth possible implementation, the CSI reportingrequest includes at least one of CSI reporting time information, CSItype information, or frequency domain information for CSI reporting.

With reference to the fifteenth or the sixteenth possible implementationof the second aspect, in a seventeenth possible implementation, the timeunit switching information includes time unit switching time informationand/or time unit duration switching indication information.

According to a third aspect, a terminal device is provided and includes:

a receiving unit, configured to receive first indication information ina first time period, where a duration of the first time period is afirst time unit;

a processing unit, configured to trigger, according to the firstindication information, a transmission unit to transmit firstinformation in a second time period; and

the transmission unit, configured to transmit the first information inthe second time period, where a duration of the second time period is asecond time unit, and a duration of the second time unit is greater thana duration of the first time unit; where

an interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

With reference to the third aspect, in a first possible implementation,the receiving unit is further configured to receive second indicationinformation; and

the processing unit is further configured to trigger the transmissionunit to transmit second information in a third time period, where aduration of the third time period is the first time unit, and at leastone part or an entirety of the third time period overlaps the secondtime period.

With reference to the first possible implementation of the third aspect,in a second possible implementation, the transmission unit is furtherconfigured to:

transmit first notification information to a network device, where thefirst notification information is used to notify the network device thatthe terminal device is capable of simultaneously transmittinginformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit.

With reference to the first or the second possible implementation of thethird aspect, in a third possible implementation, the receiving unit isfurther configured to receive first configuration informationtransmitted by the network device; and

the processing unit is further configured to configure, according to thefirst configuration information, the terminal device to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

With reference to the first to the third possible implementations of thethird aspect, in a fourth possible implementation, the processing unitis further configured to determine whether a sum of a transmit power ofa first channel carrying the first information and a transmit power of asecond channel carrying the second information is less than or equal toa first threshold, where the first threshold is a maximum transmit powervalue allowed by the terminal device;

the transmission unit is further configured to transmit the secondinformation in the third time period according to the second indicationinformation when the processing unit determines that the sum of thetransmit power of the first channel carrying the first information andthe transmit power of the second channel carrying the second informationis less than or equal to the first threshold; and

the processing unit is further configured to: when the processing unitdetermines that the sum of the transmit power of the first channelcarrying the first information and the transmit power of the secondchannel carrying the second information is greater than the firstthreshold, stop transmitting the second information in the third timeperiod; or discard the second information; or reduce the transmit powerof the second channel carrying the second information, and whendetermining that a reduction value of the transmit power of the secondchannel is less than a second threshold, use a reduced transmit power ofthe second channel to transmit the second information.

With reference to the fourth possible implementation of the thirdaspect, in a fifth possible implementation, the processing unit isfurther configured to:

if the reduction value of the transmit power of the second channel isgreater than or equal to the second threshold, stop transmitting thesecond information in the third time period, or discard the secondinformation, where the second threshold is equal to the transmit powerof the second channel×T, and a value range of T is (0, 1).

With reference to the first possible implementation of the third aspect,in a sixth possible implementation, the transmission unit is furtherconfigured to:

transmit second notification information to a network device, where thesecond notification information is used to notify the network devicethat the terminal device is incapable of simultaneously transmittinginformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit.

With reference to the first or the sixth possible implementation of thethird aspect, in a seventh possible implementation, the receiving unitis further configured to receive second configuration information; and

the processing unit is further configured to configure, according to thesecond configuration information, the terminal device to be incapable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

With reference to the first, the sixth, or the seventh possibleimplementation of the third aspect, in an eighth possibleimplementation, the transmission unit is further configured to stoptransmitting the second information in the third time period, or discardthe second information.

With reference to the fourth to the eighth possible implementations ofthe third aspect, in a ninth possible implementation, the transmissionunit is further configured to:

transmit the second information in a J^(th) first time period after thesecond time period, where J is a positive integer greater than or equalto 1.

With reference to the third aspect, or the first to the ninth possibleimplementations of the third aspect, in a tenth possible implementation,the receiving unit is specifically configured to:

receive the first indication information in the first time period in afirst carrier; and

the transmission unit is specifically configured to:

transmit the first information in the second time period in the firstcarrier or a second carrier.

With reference to the third aspect, or the first to the tenth possibleimplementations of the third aspect, in an eleventh possibleimplementation, the transmission unit is further configured to:

transmit third notification information to the network device, where thethird notification information is used to notify the network device thatthe terminal device is capable of transmitting information in a timeperiod whose duration is the second time unit and capable of receivinginformation in a time period whose duration is the first time unit.

With reference to the third aspect, or the first to the eleventhpossible implementations of the third aspect, in a twelfth possibleimplementation, the receiving unit is further configured to receivethird configuration information; and

the processing unit is further configured to configure, according to thethird configuration information, the terminal device to be capable oftransmitting information in a time period whose duration is the secondtime unit and capable of receiving information in a time period whoseduration is the first time unit.

With reference to the twelfth possible implementation of the thirdaspect, in a thirteenth possible implementation, the receiving unit isfurther configured to:

receive third information in a time period whose duration is the firsttime unit.

With reference to the third aspect, or the first to the thirteenthpossible implementations of the third aspect, in a fourteenth possibleimplementation, the transmission unit is further configured to:

transmit fourth notification information to the network device, wherethe fourth notification information is used to notify the network devicethat the terminal device is incapable of transmitting information in aplurality of uplink carriers.

With reference to the third aspect, or the first to the fourteenthpossible implementations of the third aspect, in a fifteenth possibleimplementation, the receiving unit is further configured to receivefourth configuration information; and

the processing unit is further configured to configure, according to thefourth configuration information, the terminal device to be capable oftransmitting information in a single uplink carrier.

With reference to the third aspect, or the first to the fifteenthpossible implementations of the third aspect, in a sixteenth possibleimplementation, the duration of the second time unit is a duration ofone subframe, and the duration of the first time unit is less than orequal to a duration of one timeslot.

With reference to the third aspect, or the first to the sixteenthpossible implementations of the third aspect, in a seventeenth possibleimplementation, the first indication information and the secondindication information include a channel state information CSI reportingrequest and/or time unit switching information.

With reference to the seventeenth possible implementation of the thirdaspect, in an eighteenth possible implementation, the CSI reportingrequest includes at least one of CSI reporting time information, CSItype information, or frequency domain information for CSI reporting.

With reference to the seventeenth or the eighteenth possibleimplementation of the third aspect, in a nineteenth possibleimplementation, the time unit switching information includes time unitswitching time information and/or time unit duration switchingindication information.

According to a fourth aspect, a network device is provided and includes:

a processing unit, configured to determine first indication information;and

a transmission unit, configured to transmit the first indicationinformation to a terminal device in a first time period, where aduration of the first time period is a first time unit, the firstindication information is used to trigger the terminal device totransmit first information in a second time period, a duration of thesecond time period is a second time unit, and a duration of the secondtime unit is greater than a duration of the first time unit; where

an interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

With reference to the fourth aspect, in a first possible implementation,the network device further includes a receiving unit, configured toreceive the first information transmitted by the terminal device in thesecond time period.

With reference to the first possible implementation of the fourthaspect, in a second possible implementation, the transmission unit isfurther configured to:

transmit second indication information to the terminal device, where thesecond indication information is used to trigger the terminal device totransmit second information in a third time period, a duration of thethird time period is the first time unit, and at least one part or anentirety of the third time period overlaps the second time period; and

the receiving unit is further configured to:

receive the second information transmitted by the terminal device in thethird time period according to the second indication information, or thesecond information transmitted in a J^(th) first time unit after thesecond time period, where J is a positive integer greater than or equalto 1.

With reference to the fourth aspect, or the first to the second possibleimplementations of the fourth aspect, in a third possibleimplementation, the network device further includes the receiving unit,configured to receive first notification information transmitted by theterminal device; and

the processing unit is further configured to determine, according to thefirst notification information, that the terminal device is capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

With reference to the second to the third possible implementations ofthe fourth aspect, in a fourth possible implementation, the transmissionunit is further configured to:

transmit first configuration information to the terminal device, wherethe first configuration information is used to configure the terminaldevice to be capable of simultaneously transmitting information in atime period whose duration is the first time unit and a time periodwhose duration is the second time unit.

With reference to the fourth aspect, in a fifth possible implementation,the network device further includes a receiving unit, configured toreceive second notification information transmitted by the terminaldevice; and

the processing unit is further configured to determine, according to thesecond notification information, that the terminal device is incapableof simultaneously transmitting information in a time period whoseduration is the first time unit and a time period whose duration is thesecond time unit.

With reference to the fourth aspect or the fifth possible implementationof the fourth aspect, in a sixth possible implementation, thetransmission unit is further configured to:

transmit second configuration information to the terminal device, wherethe second configuration information is used to configure the terminaldevice to be incapable of simultaneously transmitting information in atime period whose duration is the first time unit and a time periodwhose duration is the second time unit.

With reference to the fourth aspect, or the first to the sixth possibleimplementations of the fourth aspect, in a seventh possibleimplementation, the transmission unit is specifically configured to:

transmit the first indication information to the terminal device in thefirst time period in a first carrier; and

the network device further includes the receiving unit, configured toreceive the first information in the second time period in the firstcarrier or a second carrier.

With reference to the fourth aspect, or the first to the seventhpossible implementations of the fourth aspect, in an eighth possibleimplementation, the network device further includes the receiving unit,configured to receive third notification information transmitted by theterminal device; and

the processing unit is further configured to determine, according to thethird notification information, that the terminal device is capable oftransmitting information in a time period whose duration is the secondtime unit and capable of receiving information in a time period whoseduration is the first time unit.

With reference to the fourth aspect, or the first to the eighth possibleimplementations of the fourth aspect, in a ninth possibleimplementation, the transmission unit is further configured to:

transmit third configuration information to the terminal device, wherethe third configuration information is used to configure the terminaldevice to be capable of transmitting information in a time period whoseduration is the second time unit and capable of receiving information ina time period whose duration is the first time unit.

With reference to the fourth aspect, or the first to the ninth possibleimplementations of the fourth aspect, in a tenth possibleimplementation, the transmission unit is further configured to:

transmit third information in the first time period.

With reference to the fourth aspect, or the first to the tenth possibleimplementations of the fourth aspect, in an eleventh possibleimplementation, the network device further includes the receiving unit,configured to receive fourth notification information transmitted by theterminal device; and

the processing unit is further configured to determine, according to thefourth notification information, that the terminal device is incapableof transmitting information in a plurality of uplink carriers.

With reference to the fourth aspect, or the first to the eleventhpossible implementations of the fourth aspect, in a twelfth possibleimplementation, the transmission unit is further configured to:

transmit fourth configuration information to the terminal device, wherethe fourth configuration information is used to configure the terminaldevice to be capable of transmitting information in a single uplinkcarrier.

With reference to the fourth aspect, or the first to the twelfthpossible implementations of the fourth aspect, in a thirteenth possibleimplementation, the transmission unit is further configured to:

transmit at least one of first configuration information, secondconfiguration information, or third configuration information to theterminal device, where the first configuration information is used toinstruct to configure only one uplink carrier for the terminal device,the second configuration information is used to instruct to configurethe terminal device to simultaneously transmit information in the secondtime period and the first time period, and the third configurationinformation is used to instruct to configure a duration of a time periodfor receiving information and a duration of a time period fortransmitting information by the terminal device to be different.

With reference to the fourth aspect, or the first to the thirteenthpossible implementations of the fourth aspect, in a fourteenth possibleimplementation, the duration of the second time unit is a duration ofone subframe, and the duration of the first time unit is less than orequal to a duration of one timeslot.

With reference to the fourth aspect, or the first to the fourteenthpossible implementations of the fourth aspect, in a fifteenth possibleimplementation, the first indication information and the secondindication information include a channel state information CSI reportingrequest and/or time unit switching information.

With reference to the fifteenth possible implementation of the fourthaspect, in a sixteenth possible implementation, the CSI reportingrequest includes at least one of CSI reporting time information, CSItype information, or frequency domain information for CSI reporting.

With reference to the fifteenth or the sixteenth possible implementationof the fourth aspect, in a seventeenth possible implementation, the timeunit switching information includes time unit switching time informationand/or time unit duration switching indication information.

According to a fifth aspect, a terminal device is provided and includes:

a receiver, configured to receive first indication information in afirst time period, where a duration of the first time period is a firsttime unit;

a processor, configured to trigger, according to the first indicationinformation, a transmitter to transmit first information in a secondtime period; and

the transmitter, configured to transmit the first information in thesecond time period, where a duration of the second time period is asecond time unit, and a duration of the second time unit is greater thana duration of the first time unit; where

an interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

According to a sixth aspect, a network device is provided and includes:

a processor, configured to determine first indication information; and

a transmitter, configured to transmit the first indication informationto a terminal device in a first time period, where a duration of thefirst time period is a first time unit, the first indication informationis used to trigger the terminal device to transmit first information ina second time period, a duration of the second time period is a secondtime unit, and a duration of the second time unit is greater than aduration of the first time unit; where

an interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period that is separated from the firsttime period by an interval of K first time units, or a subframe adjacentto a subframe including a first time period that is separated from thefirst time period by an interval of K first time units. In the foregoingtechnical solutions, a terminal device receives first indicationinformation in a first time period; and the terminal device transmitsfirst information in a second time period, where a duration of the firsttime period is a first time unit, a duration of the second time periodis a second time unit, and a duration of the second time unit is greaterthan a duration of the first time unit. In this way, although theterminal device receives the first indication information in a firsttime unit N, the terminal device transmits the first information in asecond time unit M whose duration is greater than that of the first timeunit. Therefore, a disadvantage that a system capacity is reduced due tolack of uplink transmission resources for transmitting the firstinformation by the terminal device is avoided.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1A is a schematic diagram of a resource format in a slot accordingto an embodiment of the present disclosure;

FIG. 1B is a schematic diagram of a time sequence of scheduling uplinkinformation in an FDD system according to an embodiment of the presentdisclosure;

FIG. 1C is a schematic diagram of a PUSCH in a subframe according to anembodiment of the present disclosure;

FIG. 2A is a flowchart of data communication method according to anembodiment of the present disclosure;

FIG. 2B is a schematic diagram of a first subframe according to anembodiment of the present disclosure;

FIG. 2C is another schematic diagram of a first subframe according to anembodiment of the present disclosure;

FIG. 2D is another schematic diagram of a first subframe according to anembodiment of the present disclosure;

FIG. 2E is another schematic diagram of a first subframe according to anembodiment of the present disclosure;

FIG. 3 is a flowchart of another data communication method according toan embodiment of the present disclosure;

FIG. 4 is a flowchart of another data communication method according toan embodiment of the present disclosure;

FIG. 5A is a schematic diagram of a terminal device according to anembodiment of the present disclosure;

FIG. 5B is another schematic diagram of a terminal device according toan embodiment of the present disclosure;

FIG. 6A is a schematic diagram of a network device according to anembodiment of the present disclosure; and

FIG. 6B is another schematic diagram of a network device according to anembodiment of the present disclosure.

DESCRIPTION OF EMBODIMENTS

To make the objectives, technical solutions, and advantages of thepresent disclosure clearer, the following further describes the presentdisclosure in detail with reference to the accompanying drawings.Apparently, the described embodiments are merely a part rather than allof the embodiments of the present disclosure. All other embodimentsobtained by persons of ordinary skill in the art based on theembodiments of the present disclosure without creative efforts shallfall within the protection scope of the present disclosure.

To make the present disclosure more comprehensible, the followingdescribes the application field and basic technologies to which thepresent disclosure is applicable.

The technical solutions of the embodiments of the present disclosure maybe applied to various communications systems, such as a Global Systemfor Mobile Communication (GSM), a Code Division Multiple Access (CDMA)system, a Wideband Code Division Multiple Access (WCDMA) system, aGeneral Packet Radio Service (GPRS), and a Long Term Evolution (LTE)system.

A terminal device may also be referred to as a mobile terminal, a mobileterminal device, or the like, and this is not specifically limitedherein. The terminal device may communicate with one or more corenetwork devices through a radio access network (for example, a RadioAccess Network (RAN)). The terminal device may be a mobile terminal,such as a mobile phone (also referred to as a “cellular” phone) and acomputer with a mobile terminal. For example, the terminal device may bea portable, pocket-sized, handheld, computer built-in, or in-vehiclemobile apparatus, and the terminal device exchanges voices and/or datawith the radio access network.

A network device may be a base transceiver station (BTS) in GSM or CDMA,or may be a NodeB in WCDMA, or may be an evolved NodeB (eNB, or e-NodeB)in LTE. This is not specifically limited in the embodiments of thepresent disclosure.

A TTI of 1 ms is a subframe in a time domain, and one subframe includestwo timeslots (slot). Each slot includes six or seven symbols (symbol).A resource format in a slot is shown in FIG. 1A. One Resource Block (RB)(or Physical Resource Block (PRB)) includes 12 subcarriers in afrequency domain—6 or 7 symbols in the time domain. When a Cyclic Prefix(CP) is a normal CP, an RB occupies seven symbols in the time domain.When a CP is an extended CP, an RB occupies six symbols in the timedomain. One Resource Element (RE) includes 1 subcarrier in the frequencydomain—1 symbol in the time domain. One PRB pair includes two PRBs, intwo slots in a subframe.

In the embodiments of the present disclosure, when the TTI is of 1 ms,the terminal device receives, in an n^(th) subframe, indicationinformation about uplink information, such as indication information forreporting CSI. Then the terminal device transmits the uplink informationin an (n+k)^(th) subframe. Optionally, k may be 4. When k is 4, a timesequence relationship is shown in FIG. 1B.

In the prior art, when the TTI is of 1 ms, the CSI includes periodic CSIand aperiodic CSI. The periodic CSI is CSI periodically transmitted bythe terminal device. The aperiodic CSI is CSI that is transmitted by theterminal device in a corresponding TTI after the network device notifiesthe terminal device by using CSI indication information in DownlinkControl Information (DCI). The aperiodic CSI is transmitted only on aPhysical Uplink Shared Channel (PUSCH). Assuming that only one PRB pairin a subframe is allocated to the terminal device, a PUSCH format isshown in FIG. 1C. Distribution of CSI on a PUSCH can be seen from FIG.1C. The periodic CSI may be transmitted on the PUSCH, or may betransmitted on a Physical Uplink Control Channel (PUSCH). That is, ifthe PUSCH is transmitted in a subframe including the current TTI, theperiodic CSI may be transmitted on the PUSCH or the PUCCH; or if thePUSCH is not transmitted in a subframe including the current TTI, theperiodic CSI can be transmitted only on the PUCCH. In the prior art, ifthe periodic CSI and the aperiodic CSI collide in a subframe, theterminal device transmits only the aperiodic CSI in the subframe.

The term “plurality” denotes two or more. The term “and/or” describes anassociation relationship between associated objects and represents thatthree relationships may exist. For example, A and/or B may represent thefollowing three cases: Only A exists, both A and B exist, and only Bexists. The character “/” generally indicates an “or” relationshipbetween the associated objects.

The following describes the embodiments of the present disclosure indetail with reference to the accompanying drawings.

Referring to FIG. 2A, in an embodiment of the present disclosure, aprocedure of data communication method is as follows:

Step 200: A terminal device receives first indication information in afirst time period, where a duration of the first time period is a firsttime unit, and the first indication information is used to trigger theterminal device to transmit first information in a second time period.

Step 210: The terminal device transmits the first information in thesecond time period according to the first indication information, wherea duration of the second time period is a second time unit, and aduration of the second time unit is greater than a duration of the firsttime unit.

An interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

When the first subframe is the subframe adjacent to the subframeincluding the first time period, a subframe 2 is the first subframe, asshown in FIG. 2B.

When the first subframe is the subframe including the first time periodthat is separated from the first time period by an interval of K firsttime units, a subframe 2 is the first subframe, as shown in FIG. 2C; ora subframe 3 is the first subframe, as shown in FIG. 2D.

When the first subframe is the subframe adjacent to the subframeincluding the first time period that is separated from the first timeperiod by an interval of K first time units, a subframe 2 is the firstsubframe, as shown in FIG. 2B; or a subframe 3 is the first subframe, asshown in FIG. 2E.

Certainly, the first subframe is not limited to the foregoing severalforms, and may have other forms. Details are not described exhaustivelyherein.

In this embodiment of the present disclosure, optionally, K is 4.

In this embodiment of the present disclosure, before the terminal devicetransmits the first information in the second time period according tothe first indication information, the method further includes:

the terminal device receives second indication information, where thesecond indication information is used to trigger the terminal device totransmit second information in a third time period, a duration of thethird time period is the first time unit, and at least one part or anentirety of the third time period overlaps the second time period.

It should be noted that, that at least one part or an entirety of thethird time period overlaps the second time period indicates that thethird time period overlaps the second time period in a time domain, orcertainly may indicate other meanings. Details are not describedexhaustively herein.

Further, the terminal device transmits first notification information toa network device, where the first notification information is used tonotify the network device that the terminal device is capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

It should be noted that, a time sequence of receiving the firstindication information and transmitting the first notificationinformation is not limited. The first indication information may bereceived first and then the first notification information istransmitted, or the first notification information may be transmittedfirst and then the first indication information is received. A preferredsolution is first transmitting the first notification information andthen receiving the first indication information.

Before the terminal device transmits the first information in the secondtime period according to the first indication information, the methodfurther includes:

the terminal device receives first configuration information transmittedby the network device, where the first configuration information is usedto configure the terminal device to be capable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit.

It should be noted that, receiving the first configuration informationmay be receiving the first configuration information on a basis oftransmitting the first notification information or without transmittingthe first notification information.

After the terminal device receives the second indication information,the method further includes:

the terminal device determines whether a sum of a transmit power of afirst channel carrying the first information and a transmit power of asecond channel carrying the second information is less than or equal toa first threshold, where the first threshold is a maximum transmit powervalue allowed by the terminal device; and

if yes, the terminal device transmits the second information in thethird time period according to the second indication information;

otherwise, the terminal device stops transmitting the second informationin the third time period; or the terminal device discards the secondinformation; or the terminal device reduces the transmit power of thesecond channel carrying the second information, and when determiningthat a reduction value of the transmit power of the second channel isless than a second threshold, uses a reduced transmit power of thesecond channel to transmit the second information.

It should be noted that, herein the first channel or the second channelmay be an uplink physical channel or an uplink signal, for example, aPhysical Uplink Control Channel (PUCCH), a Physical Uplink SharedChannel (PUSCH), or an Sounding Reference Signal (SRS).

It should be noted that, “the terminal device is capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit” may be understood as “when the time period whose duration isthe first time unit overlaps the time period whose duration is thesecond time unit, the terminal device is capable of simultaneouslytransmitting information in the second time unit and the first timeunit”; and “the terminal device is configured to simultaneously transmitinformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit” may be understood as“when the time period whose duration is the first time unit overlaps thetime period whose duration is the second time unit, the terminal deviceis configured by the network device and allowed to simultaneouslytransmit information in the time period whose duration is the first timeunit and the time period whose duration is the second time unit”.

In this embodiment of the present disclosure, optionally, the reducedtransmit power of the second channel is less than or equal to adifference between the first threshold and the transmit power of thefirst channel.

In this embodiment of the present disclosure, optionally, if thereduction value of the transmit power of the second channel is greaterthan or equal to the second threshold, the terminal device stopstransmitting the second information in the third time period, or theterminal device discards the second information, where the secondthreshold may be the transmit power of the second channel×T, and a valuerange of T is (0, 1), and 0<T≤1. Optionally, T=0.75.

The terminal device transmits second notification information to anetwork device, where the second notification information is used tonotify the network device that the terminal device is incapable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

Before the terminal device transmits the first information in the secondtime period according to the first indication information, the methodfurther includes:

the terminal device receives second configuration information, where thesecond configuration information is used to configure the terminaldevice to be incapable of simultaneously transmitting information in atime period whose duration is the first time unit and a time periodwhose duration is the second time unit.

It should be noted that, receiving the second configuration informationmay be receiving the second configuration information on a basis oftransmitting the second notification information or without transmittingthe second notification information.

After the terminal device receives the first indication information inthe first time period, the method further includes:

the terminal device stops transmitting the second information in thethird time period, or the terminal device discards the secondinformation.

It should be noted that, that the terminal device stops transmitting thesecond information or discards the second information may be that theterminal device stops transmitting the second information in the thirdtime period or discards the second information. To successfully transmitthe second information, in this embodiment of the present disclosure,after the terminal device stops transmitting the second information inthe third time period, or discards the second information, the methodfurther includes:

the terminal device transmits the second information in a J^(th) firsttime period after the second time period, where J is a positive integergreater than or equal to 1.

In this embodiment of the present disclosure, carriers for receiving thefirst indication information and transmitting the first information bythe terminal device may be a same carrier, or may be different carriers.Therefore, in this embodiment of the present disclosure, optionally, theterminal device may receive the first indication information in thefirst time period in the following manner:

the terminal device receives the first indication information in thefirst time period in a first carrier; and

that the terminal device transmits the first information in the secondtime period according to the first indication information includes:

the terminal device transmits the first information in the second timeperiod in the first carrier or a second carrier.

Optionally; when a communications system is Frequency Division Duplex(FDD) system, carriers for receiving the first indication informationand transmitting the first information by the terminal device may bedifferent carriers; or when a communications system is Time DivisionDuplex (TDD) system, carriers for receiving the first indicationinformation and transmitting the first information by the terminaldevice may be a same carrier.

The terminal device transmits third notification information to thenetwork device, where the third notification information is used tonotify the network device that the terminal device is capable oftransmitting information in a time period whose duration is the secondtime unit and capable of receiving information in a time period whoseduration is the first time unit.

The method further includes:

the terminal device receives third configuration information, where thethird configuration information is used to configure the terminal deviceto be capable of transmitting information in a time period whoseduration is the second time unit and capable of receiving information ina time period whose duration is the first time unit.

It should be noted that, receiving the third configuration informationmay be receiving the third configuration information on a basis oftransmitting the third notification information or without transmittingthe third notification information.

After the terminal device receives the third configuration information,the method further includes:

the terminal device receives third information in a time period whoseduration is the first time unit.

Before the terminal device transmits the first information in the secondtime period according to the first indication information, the methodfurther includes:

the terminal device transmits fourth notification information to thenetwork device, where the fourth notification information is used tonotify the network device that the terminal device is incapable oftransmitting information in a plurality of uplink carriers.

The method further includes:

the terminal device receives fourth configuration information, where thefourth configuration information is used to configure the terminaldevice to be capable of transmitting information in a single uplinkcarrier.

It should be noted that, receiving the fourth configuration informationmay be receiving the fourth configuration information on a basis oftransmitting the fourth notification information or without transmittingthe fourth notification information.

“The terminal device is incapable of performing transmission in aplurality of uplink carriers” may be understood as “the terminal deviceis capable of performing transmission only in a single uplink carrier”,that is, the terminal device is capable of transmitting information onlyin a single uplink carrier.

“The terminal device is not configured with more than one uplinkcarrier” may be understood as “the terminal device is configured withonly one uplink carrier”.

It should be noted that, “the terminal device is not configured withmore than one uplink carrier” may also be described as “the terminaldevice is not configured with more than one serving cell”; and “theterminal device is capable of performing transmission only in a singleuplink carrier” may also be described as “the terminal device is capableof transmitting information in only one serving cell”.

A case in which the terminal device may transmit the first informationin a second time unit M is described above. In an actual application,the following case may also be included. If the terminal device iscapable of performing transmission in a plurality of uplink carriersand/or is configured with more than one uplink carrier, the terminaldevice does not transmit the first information.

In this embodiment of the present disclosure, a channel carrying thefirst indication information may be at least one of a Physical DownlinkControl Channel (PDCCH), a Physical Hybrid ARQ Indicator Channel (PHICH,physical HARQ indicator channel, Hybrid Automatic Repeat request(HARQ)), or an Enhanced Physical Downlink Control Channel (EPDCCH).

Likewise, a channel carrying the second indication information may be atleast one of the PDCCH, the PHICH, or the EPDCCH.

In this embodiment of the present disclosure, optionally, the durationof the second time unit may be a duration of one subframe, and theduration of the first time unit is less than or equal to a duration ofone timeslot.

Alternatively, the duration of the second time unit may be a duration ofone timeslot, and the duration of the first time unit is less than aduration of one timeslot, for example, may be a duration oft SC-FDMAsymbols or t OFDM symbols, where t is a positive integer less than orequal to 7. For example, a first duration is one SC-FDMA symbol, twoSC-FDMA symbols, three SC-FDMA symbols, four SC-FDMA symbols, fiveSC-FDMA symbols, six SC-FDMA symbols, seven SC-FDMA symbols, one OFDMsymbol, two OFDM symbols, three OFDM symbols, four OFDM symbols, fiveOFDM symbols, six OFDM symbols, or seven OFDM symbols. For anotherexample, a first duration may be 0.5 ms, 0.125 ms, or 0.1 ms. It shouldbe noted that, for a communications system in which a subcarrier spacingis 15 kHz, a duration of one timeslot is 0.5 ms, and a duration of onesubframe is 1 ms. For a communications system in which a subcarrierspacing is greater than 15 kHz, a duration of one timeslot may be a timeunit less than 0.5 ms, and a duration of one subframe may be a time unitless than 1 ms. Herein the duration of the timeslot and the duration ofthe subframe are not specifically limited.

In this embodiment of the present disclosure, optionally, both the firstindication information and the second indication information include aCSI reporting request and/or time unit switching information.

In this embodiment of the present disclosure, optionally, the CSIreporting request includes at least one of CSI reporting timeinformation, CSI type information, or frequency domain information forCSI reporting.

In this embodiment of the present disclosure, optionally, the CSI typeinformation indicates whether CSI is periodic CSI or aperiodic

In this embodiment of the present disclosure, optionally, the frequencydomain information for CSI reporting includes at least one of subbandinformation, subband group information, carrier information, or carriergroup information.

For example, if the frequency domain information includes the subbandinformation, the terminal device transmits the first informationaccording to the subband information, and the first information includesCSI of a subband; if the frequency domain information includes thesubband group information, the terminal device transmits the firstinformation according to the subband group information, and the firstinformation includes CSI of each subband in a subband group; if thefrequency domain information includes the carrier information, theterminal device transmits the first information according to the carrierinformation, and the first information includes CSI of a carrier; or ifthe frequency domain information includes the carrier group information,the terminal device transmits the first information according to thecarrier group information, and the first information includes CSI ofeach carrier in a carrier group.

In this embodiment of the present disclosure, optionally, the time unitswitching information includes time unit switching time informationand/or time unit duration switching indication information.

The time unit duration switching indication information includes atleast one of indication information about a first time unit, indicationinformation about a second time unit, indication information about along TTI, indication information about a short TTI, subframe indicationinformation, timeslot indication information, or symbol indicationinformation.

The time unit switching time information includes at least one of a timeof switching from a first time unit to a second time unit, a time ofswitching from a second time unit to a first time unit, a quantity offirst time units traversed during switching from a first time unit to asecond time unit, a minimum quantity of first time units traversedduring switching from a first time unit to a second time unit, a maximumquantity of first time units traversed during switching from a firsttime unit to a second time unit, a quantity of second time unitstraversed during switching from a second time unit to a first time unit,a minimum quantity of second time units traversed during switching froma second time unit to a first time unit, or a maximum quantity of secondtime units traversed during switching from a second time unit to a firsttime unit.

In this embodiment of the present disclosure, “the terminal device iscapable of simultaneously transmitting information in a time periodwhose duration is the first time unit and a time period whose durationis the second time unit” may also be described as “the terminal devicesupports a function of being capable of simultaneously transmittinginformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit”.

Terms “more than one” and “at least two” described in this embodiment ofthe present disclosure have a same meaning, and may replace each otherin use. This is not specifically limited herein.

It should be noted that, in this embodiment of the present disclosure,whether the terminal device is configured to perform some operations orhave some capabilities may be determined according to receivedconfiguration information transmitted by the network device. Therefore,further, the terminal device receives at least one of firstconfiguration information, second configuration information, or thirdconfiguration information transmitted by the network device. The firstconfiguration information is used to configure only one uplink carrierfor the terminal device. Further, the first configuration informationmay be further used to instruct to configure more than one uplinkcarrier for the terminal device. The second configuration information isused to indicate that the terminal device is configured to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit. Further, the second configuration information is further usedto indicate that the terminal device is not configured to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit. The third configuration information is used to instruct toconfigure a duration of a time period for receiving information and aduration of a time period for transmitting information by the terminaldevice to be different. Further, the third configuration information isfurther used to instruct to configure a duration of a time period forreceiving information and a duration of a time period for transmittinginformation by the terminal device to be the same.

For example, that the terminal device is configured to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit may be: the terminal device receives the second configurationinformation transmitted by the network device, and the terminal devicedetermines, according to the second configuration information, that theterminal device is configured to be capable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit.

For another example, that the terminal device is not configured to becapable of simultaneously transmitting information in a time periodwhose duration is the first time unit and a time period whose durationis the second time unit may be that the terminal device has not receivedthe second configuration information transmitted by the network device.

For another example, that the terminal device configures a duration of atime period for receiving information and a duration of a time periodfor transmitting information by the terminal device to be different maybe that the terminal device receives the third configurationinformation, and determines, according to the third configurationinformation, that the terminal device is configured to transmitinformation and receive information in time periods of differentdurations.

For another example, that the terminal device determines that theterminal device is not configured with more than one uplink carrier maybe: when the terminal device has not received the first configurationinformation transmitted by the network device, the terminal devicedetermines that the terminal device is not configured with more than oneuplink carrier; or the terminal device receives the first configurationinformation transmitted by the network device, and determines, accordingto the first configuration information, that the terminal device is notconfigured with more than one uplink carrier or is configured with onlyone uplink carrier.

That the third configuration information is used to instruct toconfigure a duration of a time period for receiving information and aduration of a time period for transmitting information by the terminaldevice to be different may be that the third configuration informationis used to instruct to configure the terminal device to receiveinformation in the first time period and transmit information in thesecond time period. For example, a physical downlink shared channel(PDSCH) is received in the first time period, that is, the PDSCH istransmitted in the duration of the first time period; and a PUSCH istransmitted in the second time period, that is, the PUSCH is received inthe duration of the second time period.

Optionally, the PUSCH is transmitted in a TTI of 1 ms, and the PDSCH isreceived in two OFDM symbols.

In this embodiment, the terminal device receives the first indicationinformation in the first time period; and the terminal device transmitsthe first information in the second time period, where the duration ofthe first time period is the first time unit, the duration of the secondtime period is the second time unit, and the duration of the second timeunit is greater than the duration of the first time unit. In this way,although the terminal device receives the first indication informationin a first time unit N, the terminal device transmits the firstinformation in a second time unit M whose duration is greater than thatof the first time unit. Therefore, a disadvantage that a system capacityis reduced due to lack of uplink transmission resources for transmittingthe first information by the terminal device is avoided.

Referring to FIG. 3, in an embodiment of the present disclosure, aprocedure of data communication method is as follows:

Step 300: A network device determines first indication information.

Step 310: The network device transmits the first indication informationto a terminal device in a first time period, where a duration of thefirst time period is a first time unit, the first indication informationis used to trigger the terminal device to transmit first information ina second time period, a duration of the second time period is a secondtime unit, and a duration of the second time unit is greater than aduration of the first time unit.

An interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

In this embodiment of the present disclosure, optionally, K is 4.

When the first subframe is the subframe adjacent to the subframeincluding the first time period, a subframe 2 is the first subframe, asshown in FIG. 2B.

When the first subframe is the subframe including the first time periodthat is separated from the first time period by an interval of K firsttime units, a subframe 2 is the first subframe, as shown in FIG. 2C; ora subframe 3 is the first subframe, as shown in FIG. 2D.

When the first subframe is the subframe adjacent to the subframeincluding the first time period that is separated from the first timeperiod by an interval of K first time units, a subframe 2 is the firstsubframe, as shown in FIG. 2B; or a subframe 3 is the first subframe, asshown in FIG. 2E.

Certainly, the first subframe is not limited to the foregoing severalmanners, and may have other manners. Details are not describedexhaustively herein.

In this embodiment of the present disclosure, after the network devicetransmits the first indication information to the terminal device in thefirst time period, the method further includes:

the network device receives the first information transmitted by theterminal device in the second time period.

In this embodiment of the present disclosure, before the network devicereceives the first information transmitted by the terminal device, themethod further includes:

the network device transmits second indication information to theterminal device, where the second indication information is used totrigger the terminal device to transmit second information in a thirdtime period, a duration of the third time period is the first time unit,and at least one part or an entirety of the third time period overlapsthe second time period; and

the network device receives the second information transmitted by theterminal device in the third time period according to the secondindication information, or the second information transmitted in aJ^(th) first time unit after the second time period, where J is apositive integer greater than or equal to 1.

It should be noted that, the first information may be an aperiodic CSIreport, and the second information may be a periodic CSI report. Hereinthe periodic CSI report and the aperiodic CSI report may correspond to asame carrier, or may correspond to different carriers. Alternatively,the first information is an aperiodic CSI report, and the secondinformation is also an aperiodic CSI report. Herein the two aperiodicCSI reports may be two parts of an aperiodic CSI report, or may be twoaperiodic CSI reports.

Before the network device transmits the first indication information tothe terminal device in the first time period, the method furtherincludes:

the network device receives first notification information transmittedby the terminal device, where the first notification information is usedto notify the network device that the terminal device is capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

It should be noted that, a time sequence of transmitting the firstindication information and receiving the first notification informationis not limited. The first indication information may be transmittedfirst and then the first notification information is received, or thefirst notification information may be received first and then the firstindication information is transmitted. A preferred solution is firstreceiving the first notification information and then transmitting thefirst indication information.

The method further includes:

the network device transmits first configuration information to theterminal device, where the first configuration information is used toconfigure the terminal device to be capable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit.

It should be noted that, transmitting the first configurationinformation may be transmitting the first configuration information on abasis of receiving the first notification information or withoutreceiving the first notification information.

The method further includes:

the network device receives second notification information transmittedby the terminal device, where the second notification information isused to notify the network device that the terminal device is incapableof simultaneously transmitting information in a time period whoseduration is the first time unit and a time period whose duration is thesecond time unit.

The method further includes:

the network device transmits second configuration information to theterminal device, where the second configuration information is used toconfigure the terminal device to be incapable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit.

It should be noted that, transmitting the second configurationinformation may be transmitting the second configuration information ona basis of receiving the second notification information or without thesecond notification information.

In this embodiment of the present disclosure, carriers for transmittingthe first indication information and receiving the first information bythe network device may be a same carrier, or may be different carriers.Therefore, in this embodiment of the present disclosure, that thenetwork device transmits the first indication information to a terminaldevice in a first time period includes:

the network device transmits the first indication information to theterminal device in the first time period in a first carrier; and

that the network device receives the first information transmitted bythe terminal device in the second time period includes:

the network device receives the first information in the second timeperiod in the first carrier or a second carrier.

Optionally, when a communications system is FDD, carriers for receivingthe first indication information and transmitting the first informationby the terminal device may be different carriers; or when acommunications system is TDD, carriers for receiving the firstindication information and transmitting the first information by theterminal device may be a same carrier.

The method further includes:

the network device receives third notification information transmittedby the terminal device, where the third notification information is usedto notify the network device that the terminal device is capable oftransmitting information in a time period whose duration is the secondtime unit and capable of receiving information in a time period whoseduration is the first time unit.

The method further includes:

the network device transmits third configuration information to theterminal device, where the third configuration information is used toconfigure the terminal device to be capable of transmitting informationin a time period whose duration is the second time unit and capable ofreceiving information in a time period whose duration is the first timeunit.

It should be noted that, transmitting the third configurationinformation may be transmitting the third configuration information on abasis of receiving the third notification information or withoutreceiving the third notification information.

The method further includes:

the network device transmits third information in the first time period.

The method further includes:

the network device receives fourth notification information transmittedby the terminal device, where the fourth notification information isused to notify the network device that the terminal device is incapableof transmitting information in a plurality of uplink carriers.

The method further includes:

the network device transmits fourth configuration information to theterminal device, where the fourth configuration information is used toconfigure the terminal device to be capable of transmitting informationin a single uplink carrier.

It should be noted that, transmitting the fourth configurationinformation may be transmitting the fourth configuration information ona basis of receiving the fourth notification information or withoutreceiving the fourth notification information.

The method further includes:

the network device transmits at least one of first configurationinformation, second configuration information, or third configurationinformation to the terminal device, where the first configurationinformation is used to instruct to configure only one uplink carrier forthe terminal device, the second configuration information is used toinstruct to configure the terminal device to simultaneously transmitinformation in the second time period and the first time period, and thethird configuration information is used to instruct to configure aduration of a time period for receiving information and a duration of atime period for transmitting information by the terminal device to bedifferent.

It should be noted that, herein a first channel or a second channel maybe an uplink physical channel or an uplink signal, for example, a PUCCH,a PUSCH, or an SRS.

In this embodiment of the present disclosure, optionally, the durationof the second time unit is a duration of one subframe, and the durationof the first time unit is less than or equal to a duration of onetimeslot.

In this embodiment of the present disclosure, optionally, the durationof the second time unit may also be a duration of one timeslot, and theduration of the first time unit is less than a duration of one timeslot.It should be noted that, for a communications system in which asubcarrier spacing is 15 kHz, a duration of one timeslot is 0.5 ms, anda duration of one subframe is 1 ms. For a communications system in whicha subcarrier spacing is greater than 15 kHz, a duration of one timeslotmay be a time unit less than 0.5 ms, and a duration of one subframe maybe a time unit less than 1 ms. Herein the duration of the timeslot andthe duration of the subframe are not specifically limited.

In this embodiment of the present disclosure, both the first indicationinformation and the second indication information include a CSIreporting request and/or time unit switching information.

In this embodiment of the present disclosure, optionally, the CSIreporting request includes at least one of CSI reporting timeinformation, CSI type information, or frequency domain information forCSI reporting.

In this embodiment of the present disclosure, optionally, the CSI typeinformation indicates whether CSI is periodic CSI or aperiodic CSI.

For example, if the frequency domain information includes subbandinformation, the terminal device transmits the first informationaccording to the subband information, and the first information includesCSI of a subband; if the frequency domain information includes subbandgroup information, the terminal device transmits the first informationaccording to the subband group information, and the first informationincludes CSI of each subband in a subband group; if the frequency domaininformation includes carrier information, the terminal device transmitsthe first information according to the carrier information, and thefirst information includes CSI of a carrier; or if the frequency domaininformation includes carrier group information, the terminal devicetransmits the first information according to the carrier groupinformation, and the first information includes CSI of each carrier in acarrier group.

In this embodiment of the present disclosure, optionally, the time unitswitching information includes time unit switching time informationand/or time unit duration switching indication information.

The time unit duration switching indication information includes atleast one of indication information about a first time unit, indicationinformation about a second time unit, indication information about along TTI, indication information about a short TTI, subframe indicationinformation, timeslot indication information, or symbol indicationinformation. The time unit switching time information includes at leastone of a time of switching from a first time unit to a second time unit,a time of switching from a second time unit to a first time unit, aquantity of first time units traversed during switching from a firsttime unit to a second time unit, a minimum quantity of first time unitstraversed during switching from a first time unit to a second time unit,a maximum quantity of first time units traversed during switching from afirst time unit to a second time unit, a quantity of second time unitstraversed during switching from a second time unit to a first time unit,a minimum quantity of second time units traversed during switching froma second time unit to a first time unit, or a maximum quantity of secondtime units traversed during switching from a second time unit to a firsttime unit.

It should be noted that, a precondition for receiving the firstinformation by the network device is: the network device determines thatthe terminal device is incapable of performing transmission in aplurality of uplink carriers, and/or the network device does nottransmit, to the terminal device, information for instructing toconfigure not more than one uplink carrier.

“The terminal device is incapable of performing transmission in aplurality of uplink carriers” may be understood as “the network devicedetermines, according to capability information reported by the terminaldevice, that the terminal device is capable of performing transmissiononly in a single uplink carrier”, that is, the terminal device iscapable of transmitting information only in a single uplink carrier.

“The network device does not transmit, to the terminal device,information for instructing to configure not more than one uplinkcarrier” may be understood as “the terminal device determines, accordingto the indication information, that the terminal device is notconfigured with more than one uplink carrier”, that is, the terminaldevice is configured with only one uplink carrier.

It should be noted that, “the network device transmits, to the terminaldevice, information for instructing to configure not more than oneuplink carrier” may also be described as “the network device transmits,to the terminal device, information for instructing to configure notmore than one serving cell”; “the terminal device is not configured withmore than one uplink carrier” may also be described as “the terminaldevice is not configured with more than one serving cell”; and “theterminal device is capable of performing transmission only in a singleuplink carrier” may also be described as “the terminal device is capableof transmitting information in only one serving cell”.

It should be noted that, in this embodiment of the present disclosure,whether the terminal device is configured to perform some operations orhave some capabilities may be determined according to receivedconfiguration information transmitted by the network device. Therefore,further, the terminal device receives at least one of firstconfiguration information, second configuration information, or thirdconfiguration information transmitted by the network device. The firstconfiguration information is used to configure only one uplink carrierfor the terminal device. Further, the first configuration informationmay be further used to instruct to configure more than one uplinkcarrier for the terminal device. The second configuration information isused to indicate that the terminal device is configured to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit. Further, the second configuration information is further usedto indicate that the terminal device is not configured to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit. The third configuration information is used to instruct toconfigure a duration of a time period for receiving information and aduration of a time period for transmitting information by the terminaldevice to be different. Further, the third configuration information isfurther used to instruct to configure a duration of a time period forreceiving information and a duration of a time period for transmittinginformation by the terminal device to be the same.

For example, that the terminal device is configured to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit may be: the terminal device receives the second configurationinformation transmitted by the network device, and the terminal devicedetermines, according to the second configuration information, that theterminal device is configured to be capable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit.

For another example, that the terminal device is not configured to becapable of simultaneously transmitting information in a time periodwhose duration is the first time unit and a time period whose durationis the second time unit may be that the terminal device has not receivedthe second configuration information transmitted by the network device.

For another example, that the terminal device configures a duration of atime period for receiving information and a duration of a time periodfor transmitting information by the terminal device to be different maybe that the terminal device receives the third configurationinformation, and determines, according to the third configurationinformation, that the terminal device is configured to transmitinformation and receive information in time periods of differentdurations.

For another example, that the terminal device determines that theterminal device is not configured with more than one uplink carrier maybe: when the terminal device has not received the first configurationinformation transmitted by the network device, the terminal devicedetermines that the terminal device is not configured with more than oneuplink carrier; or the terminal device receives the first configurationinformation transmitted by the network device, and determines, accordingto the first configuration information, that the terminal device is notconfigured with more than one uplink carrier or is configured with onlyone uplink carrier.

That the third configuration information is used to instruct toconfigure a duration of a time period for receiving information and aduration of a time period for transmitting information by the terminaldevice to be different may be that the third configuration informationis used to instruct to configure the terminal device to receiveinformation in the first time period and transmit information in thesecond time period. For example, a physical downlink shared channel(PDSCH) is received in the first time period, that is, the PDSCH istransmitted in the duration of the first time period; and a PUSCH istransmitted in the second time period, that is, the PUSCH is transmittedin the duration of the second time period.

Optionally, the PUSCH is transmitted in a TTI of 1 ms, and the PDSCH isreceived in two OFDM symbols.

In this embodiment, the terminal device receives the first indicationinformation in the first time period; and the terminal device transmitsthe first information in the second time period, where the duration ofthe first time period is the first time unit, the duration of the secondtime period is the second time unit, and the duration of the second timeunit is greater than the duration of the first time unit. In this way,although the terminal device receives the first indication informationin a first time unit N, the terminal device transmits the firstinformation in a second time unit M whose duration is greater than thatof the first time unit. Therefore, a disadvantage that a system capacityis reduced due to lack of uplink transmission resources for transmittingthe first information by the terminal device is avoided.

Referring to FIG. 4, the following describes a procedure of datacommunication method from a perspective of interaction between aterminal device and a network device. A specific process is as follows:

Step 400: The network device determines first indication information.

Step 410: The network device transmits the first indication informationto the terminal device in a first time period.

Step 420: The terminal device receives, in the first time period, thefirst indication information transmitted by the network device,

Step 430: The terminal device transmits first information to the networkdevice in a second time period according to the first indicationinformation.

In this step, an interval of K first time units exists between thesecond time period and the first time period, K is a positive integer, astart position of a first symbol of the second time period is the sameas a start position of a first symbol of a first subframe, and the firstsubframe is a subframe adjacent to a subframe including the first timeperiod, or a subframe including a first time period which has aninterval of K first time units with the first time period, or a subframeadjacent to a subframe including a first time period which has aninterval of K first time units with the first time period.

In this embodiment of the present disclosure, optionally, K is 4.

When the first subframe is the subframe adjacent to the subframeincluding the first time period, a subframe 2 is the first subframe, asshown in FIG. 2B.

When the first subframe is the subframe including the first time periodthat is separated from the first time period by an interval of K firsttime units, a subframe 2 is the first subframe, as shown in FIG. 2C; ora subframe 3 is the first subframe, as shown in FIG. 2D.

When the first subframe is the subframe adjacent to the subframeincluding the first time period that is separated from the first timeperiod by an interval of K first time units, a subframe 2 is the firstsubframe, as shown in FIG. 2B; or a subframe 3 is the first subframe, asshown in FIG. 2E.

Certainly, the first subframe is not limited to the foregoing severalmanners, and may have other manners. Details are not describedexhaustively herein.

In this embodiment of the present disclosure, before the terminal devicetransmits the first information in the second time period according tothe first indication information, the method further includes:

the terminal device receives second indication information, where thesecond indication information is used to trigger the terminal device totransmit second information in a third time period, a duration of thethird time period is a first time unit, and at least one part or anentirety of the third time period overlaps the second time period.

It should be noted that, that at least one part or an entirety of thethird time period overlaps the second time period indicates that thethird time period overlaps the second time period in a time domain, orcertainly may indicate other meanings. Details are not describedexhaustively herein.

Further, the terminal device transmits first notification information tothe network device, where the first notification information is used tonotify the network device that the terminal device is capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is a second timeunit.

It should be noted that, a time sequence of receiving the firstindication information and transmitting the first notificationinformation is not limited. The first indication information may bereceived first and then the first notification information istransmitted, or the first notification information may be transmittedfirst and then the first indication information is received. A preferredsolution is firm transmitting the first notification information andthen receiving the first indication information.

Before the terminal device transmits the first information in the secondtime period according to the first indication information, the methodfurther includes:

the terminal device receives first configuration information transmittedby the network device, where the first configuration information is usedto configure the terminal device to be capable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit.

It should be noted that, receiving the first configuration informationmay be receiving the first configuration information on a basis oftransmitting the first notification information or without transmittingthe first notification information.

After the terminal device receives the second indication information,the method further includes:

the terminal device determines whether a sum of a transmit power of afirst channel carrying the first information and a transmit power of asecond channel carrying the second information is less than or equal toa first threshold, where the first threshold is a maximum transmit powervalue allowed by the terminal device; and

if yes, the terminal device transmits the second information in thethird time period according to the second indication information;

otherwise, the terminal device stops transmitting the second informationin the third time period; or the terminal device discards the secondinformation; or the terminal device reduces the transmit power of thesecond channel carrying the second information, and when determiningthat a reduction value of the transmit power of the second channel isless than a second threshold, uses a reduced transmit power of thesecond channel to transmit the second information.

It should be noted that, herein the first channel or the second channelmay be an uplink physical channel or an uplink signal, for example, aPUCCH, a PUSCH, or an SRS.

It should be noted that, “the terminal device is capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit” may be understood as “when the time period whose duration isthe first time unit overlaps the time period whose duration is thesecond time unit, the terminal device is capable of simultaneouslytransmitting information in the second time unit and the first timeunit”; and “the terminal device is configured to simultaneously transmitinformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit” may be understood as“when the time period whose duration is the first time unit overlaps thetime period whose duration is the second time unit, the terminal deviceis configured by the network device and allowed to simultaneouslytransmit information in the time period whose duration is the first timeunit and the time period whose duration is the second time unit”.

In this embodiment of the present disclosure, optionally; the reducedtransmit power of the second channel is less than or equal to adifference between the first threshold and the transmit power of thefirst channel.

After the terminal device receives the second indication information,the method further includes:

the terminal device determines whether a sum of a transmit power of afirst channel carrying the first information and a transmit power of asecond channel carrying the second information is less than or equal toa first threshold, where the first threshold is a maximum transmit powervalue allowed by the terminal device; and

if yes, the terminal device transmits the second information in thethird time period according to the second indication information;

otherwise, the terminal device stops transmitting the second informationin the third time period; or the terminal device discards the secondinformation; or the terminal device reduces the transmit power of thesecond channel carrying the second information, and when determiningthat a reduction value of the transmit power of the second channel isless than a second threshold, uses a reduced transmit power of thesecond channel to transmit the second information.

In this embodiment of the present disclosure, optionally, if thereduction value of the transmit power of the second channel is greaterthan or equal to the second threshold, the terminal device stopstransmitting the second information in the third time period, or theterminal device discards the second information, where the secondthreshold may be the transmit power of the second channel×T, and a valuerange of T is (0, 1), and 0<T≤1. Optionally, T=0.75.

The terminal device transmits second notification information to thenetwork device, where the second notification information is used tonotify the network device that the terminal device is incapable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

Before the terminal device transmits the first information in the secondtime period according to the first indication information, the methodfurther includes:

the terminal device receives second configuration information, where thesecond configuration information is used to configure the terminaldevice to be incapable of simultaneously transmitting information in atime period whose duration is the first time unit and a time periodwhose duration is the second time unit.

It should be noted that, receiving the second configuration informationmay be receiving the second configuration information on a basis oftransmitting the second notification information or without transmittingthe second notification information.

After the terminal device receives the first indication information inthe first time period, the method further includes:

the terminal device stops transmitting the second information in thethird time period, or the terminal device discards the secondinformation.

It should be noted that, that the terminal device stops transmitting thesecond information or discards the second information may be that theterminal device stops transmitting the second information in the thirdtime period or discards the second information. To successfully transmitthe second information, in this embodiment of the present disclosure,

after the terminal device stops transmitting the second information inthe third time period, or discards the second information, the methodfurther includes:

the terminal device transmits the second information in a J^(th) firsttime period after the second time period, where J is a positive integergreater than or equal to 1.

In this embodiment of the present disclosure, carriers for receiving thefirst indication information and transmitting the first information bythe terminal device may be a same carrier, or may be different carriers.Therefore, in this embodiment of the present disclosure, optionally, theterminal device may receive the first indication information in thefirst time period in the following manner:

the terminal device receives the first indication information in thefirst time period in a first carrier; and

that the terminal device transmits first information in a second timeperiod according to the first indication information includes:

the terminal device transmits the first information in the second timeperiod in the first carrier or a second carrier.

Optionally, when a communications system is FDD, carriers for receivingthe first indication information and transmitting the first informationby the terminal device may be different carriers; or when acommunications system is TDD, carriers for receiving the firstindication information and transmitting the first information by theterminal device may be a same carrier.

The terminal device transmits third notification information to thenetwork device, where the third notification information is used tonotify the network device that the terminal device is capable oftransmitting information in a time period whose duration is the secondtime unit and capable of receiving information in a time period whoseduration is the first time unit.

The method further includes:

the terminal device receives third configuration information, where thethird configuration information is used to configure the terminal deviceto be capable of transmitting information in a time period whoseduration is the second time unit and capable of receiving information ina time period whose duration is the first time unit.

It should be noted that, receiving the third configuration informationmay be receiving the third configuration information on a basis oftransmitting the third notification information or without transmittingthe third notification information.

After the terminal device receives the third configuration information,the method further includes:

the terminal device receives third information in a time period whoseduration is the first time unit.

Before the terminal device transmits the first information in the secondtime period according to the first indication information, the methodfurther includes:

the terminal device transmits fourth notification information to thenetwork device, where the fourth notification information is used tonotify the network device that the terminal device is incapable oftransmitting information in a plurality of uplink carriers.

The method further includes:

the terminal device receives fourth configuration information, where thefourth configuration information is used to configure the terminaldevice to be capable of transmitting information in a single uplinkcarrier.

It should be noted that, receiving the fourth configuration informationmay be receiving the fourth configuration information on a basis oftransmitting the fourth notification information or without transmittingthe fourth notification information.

“The terminal device is incapable of performing transmission in aplurality of uplink carriers” may be understood as “the terminal deviceis capable of performing transmission only in a single uplink carrier”,that is, the terminal device is capable of transmitting information onlyin a single uplink carrier.

“The terminal device is not configured with more than one uplinkcarrier” may be understood as “the terminal device is configured withonly one uplink carrier”.

It should be noted that, “the terminal device is not configured withmore than one uplink carrier” may also be described as “the terminaldevice is not configured with more than one serving cell”; and “theterminal device is capable of performing transmission only in a singleuplink carrier” may also be described as “the terminal device is capableof transmitting information in only one serving cell”.

A case in which the terminal device may transmit the first informationin a second time unit M is described above. In an actual application,the following case may also be included: If the terminal device iscapable of performing transmission in a plurality of uplink carriersand/or is configured with more than one uplink carrier, the terminaldevice does not transmit the first information.

In this embodiment of the present disclosure, a channel carrying thefirst indication information may be at least one of a PDCCH, a PHICH, oran EPDCCH.

Likewise, a channel carrying the second indication information may be atleast one of the PDCCH, the PHICH, or the EPDCCH.

In this embodiment of the present disclosure, optionally, a duration ofthe second time unit may be a duration of one subframe, and a durationof the first time unit is less than or equal to a duration of onetimeslot

Alternatively, a duration of the second time unit may be a duration ofone timeslot, and a duration of the first time unit is less than aduration of one timeslot. It should be noted that, for a communicationssystem in which a subcarrier spacing is 15 kHz, a duration of onetimeslot is 0.5 ms, and a duration of one subframe is 1 ms. For acommunications system in which a subcarrier spacing is greater than 15kHz, a duration of one timeslot may be a time unit less than 0.5 ms, anda duration of one subframe may be a time unit less than 1 ms. Herein theduration of the timeslot and the duration of the subframe are notspecifically limited.

In this embodiment of the present disclosure, optionally, both the firstindication information and the second indication information include aCSI reporting request and/or time unit switching information.

In this embodiment of the present disclosure, optionally, the CSIreporting request includes at least one of CSI reporting timeinformation, CSI type information, or frequency domain information forCSI reporting.

In this embodiment of the present disclosure, optionally, the CSI typeinformation indicates whether CSI is periodic CSI or aperiodic CSI.

In this embodiment of the present disclosure, optionally, the frequencydomain information for CSI reporting includes at least one of subbandinformation, subband group information, carrier information, or carriergroup information.

For example, if the frequency domain information includes the subbandinformation, the terminal device transmits the first informationaccording to the subband information, and the first information includesCSI of a subband; if the frequency domain information includes thesubband group information, the terminal device transmits the firstinformation according to the subband group information, and the firstinformation includes CSI of each subband in a subband group; if thefrequency domain information includes the carrier information, theterminal device transmits the first information according to the carrierinformation, and the first information includes CSI of a carrier; or ifthe frequency domain information includes the carrier group information,the terminal device transmits the first information according to thecarrier group information, and the first information includes CSI ofeach carrier in a carrier group.

In this embodiment of the present disclosure, optionally, the time unitswitching information includes time unit switching time informationand/or time unit duration switching indication information.

The time unit duration switching indication information includes atleast one of indication information about a first time unit, indicationinformation about a second time unit, indication information about along TTI, indication information about a short TTI, subframe indicationinformation, timeslot indication information, or symbol indicationinformation.

The time unit switching time information includes at least one of a timeof switching from a first time unit to a second time unit, a time ofswitching from a second time unit to a first time unit, a quantity offirst time units traversed during switching from a first time unit to asecond time unit, a minimum quantity of first time units traversedduring switching from a first time unit to a second time unit, a maximumquantity of first time units traversed during switching from a firsttime unit to a second time unit, a quantity of second time unitstraversed during switching from a second time unit to a first time unit,a minimum quantity of second time units traversed during switching froma second time unit to a first time unit, or a maximum quantity of secondtime units traversed during switching from a second time unit to a firsttime unit.

In this embodiment of the present disclosure, “the terminal device iscapable of simultaneously transmitting information in a time periodwhose duration is the first time unit and a time period whose durationis the second time unit” may also be described as “the terminal devicesupports a function of being capable of simultaneously transmittinginformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit”.

Terms “more than one” and “at least two” described in this embodiment ofthe present disclosure have a same meaning, and may replace each otherin use. This is not specifically limited herein.

It should be noted that, in this embodiment of the present disclosure,whether the terminal device is configured to perform some operations orhave some capabilities may be determined according to receivedconfiguration information transmitted by the network device. Therefore,further, the terminal device receives at least one of firstconfiguration information, second configuration information, or thirdconfiguration information transmitted by the network device. The firstconfiguration information is used to configure only one uplink carrierfor the terminal device. Further, the first configuration informationmay be further used to instruct to configure more than one uplinkcarrier for the terminal device. The second configuration information isused to indicate that the terminal device is configured to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit. Further, the second configuration information is further usedto indicate that the terminal device is not configured to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit. The third configuration information is used to instruct toconfigure a duration of a time period for receiving information and aduration of a time period for transmitting information by the terminaldevice to be different. Further, the third configuration information isfurther used to instruct to configure a duration of a time period forreceiving information and a duration of a time period for transmittinginformation by the terminal device to be the same.

For example, that the terminal device is configured to be capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit may be: the terminal device receives the second configurationinformation transmitted by the network device, and the terminal devicedetermines, according to the second configuration information, that theterminal device is configured to be capable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit.

For another example, that the terminal device is not configured to becapable of simultaneously transmitting information in a time periodwhose duration is the first time unit and a time period whose durationis the second time unit may be that the terminal device has not receivedthe second configuration information transmitted by the network device.

For another example, that the terminal device configures a duration of atime period for receiving information and a duration of a time periodfor transmitting information by the terminal device to be different maybe that the terminal device receives the third configurationinformation, and determines, according to the third configurationinformation, that the terminal device is configured to transmitinformation and receive information in time periods of differentdurations.

For another example, that the terminal device determines that theterminal device is not configured with more than one uplink carrier maybe: when the terminal device has not received the first configurationinformation transmitted by the network device, the terminal devicedetermines that the terminal device is not configured with more than oneuplink carrier; or the terminal device receives the first configurationinformation transmitted by the network device, and determines, accordingto the first configuration information, that the terminal device is notconfigured with more than one uplink carrier or is configured with onlyone uplink carrier.

That the third configuration information is used to instruct toconfigure a duration of a time period for receiving information and aduration of a time period for transmitting information by the terminaldevice to be different may be that the third configuration informationis used to instruct to configure the terminal device to receiveinformation in the first time period and transmit information in thesecond time period. For example, a PDSCH is received in the first timeperiod, that is, the PDSCH is transmitted in a duration of the firsttime period; and a PUSCH is transmitted in the second time period, thatis, the PUSCH is transmitted in a duration of the second time period.

Optionally, the PUSCH is transmitted in a TTI of 1 ms, and the PDSCH isreceived in two OFDM symbols.

In this embodiment, the terminal device receives the first indicationinformation in the first time period; and the terminal device transmitsthe first information in the second time period, where the duration ofthe first time period is the first time unit, the duration of the secondtime period is the second time unit, and the duration of the second timeunit is greater than the duration of the first time unit. In this way,although the terminal device receives the first indication informationin a first time unit N, the terminal device transmits the firstinformation in a second time unit M whose duration is greater than thatof the first time unit. Therefore, a disadvantage that a system capacityis reduced due to lack of uplink transmission resources for transmittingthe first information by the terminal device is avoided.

Referring to FIG. 5A, an embodiment of the present disclosure furtherprovides a terminal device. The terminal device includes a receivingunit 50, a processing unit 51, and a transmission unit 52.

The receiving unit 50 is configured to receive first indicationinformation in a first time period, where a duration of the first timeperiod is a first time unit.

The processing unit 51 is configured to trigger, according to the firstindication information, the transmission unit 52 to transmit firstinformation in a second time period.

The transmission unit 52 is configured to transmit the first informationin the second time period, where a duration of the second time period isa second time unit, and a duration of the second time unit is greaterthan a duration of the first time unit.

An interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

The receiving unit 50 is further configured to:

receive second indication information; and

the processing unit 51 is further configured to trigger the transmissionunit 52 to transmit second information in a third time period, where aduration of the third time period is the first time unit, and at leastone part or an entirety of the third time period overlaps the secondtime period.

The transmission unit 52 is further configured to:

transmit first notification information to a network device, where thefirst notification information is used to notify the network device thatthe terminal device is capable of simultaneously transmittinginformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit.

The receiving unit 50 is further configured to:

receive first configuration information transmitted by the networkdevice; and

the processing unit 51 is further configured to configure, according tothe first configuration information, the terminal device to be capableof simultaneously transmitting information in a time period whoseduration is the first time unit and a time period whose duration is thesecond time unit.

The processing unit 51 is further configured to determine whether a sumof a transmit power of a first channel carrying the first informationand a transmit power of a second channel carrying the second informationis less than or equal to a first threshold, where the first threshold isa maximum transmit power value allowed by the terminal device;

the transmission unit 52 is further configured to transmit the secondinformation in the third time period according to the second indicationinformation when the processing unit 51 determines that the sum of thetransmit power of the first channel carrying the first information andthe transmit power of the second channel carrying the second informationis less than or equal to the first threshold; and

the processing unit 51 is further configured to: when the processingunit 51 determines that the sum of the transmit power of the firstchannel carrying the first information and the transmit power of thesecond channel carrying the second information is greater than the firstthreshold, stop transmitting the second information in the third timeperiod; or discard the second information; or reduce the transmit powerof the second channel carrying the second information, and whendetermining that a reduction value of the transmit power of the secondchannel is less than a second threshold, use a reduced transmit power ofthe second channel to transmit the second information.

The processing unit 51 is further configured to:

if the reduction value of the transmit power of the second channel isgreater than or equal to the second threshold, stop transmitting thesecond information in the third time period, or discard the secondinformation, where the second threshold is equal to the transmit powerof the second channel×T, and a value range of T is (0, 1).

The transmission unit 52 is further configured to:

transmit second notification information to a network device, where thesecond notification information is used to notify the network devicethat the terminal device is incapable of simultaneously transmittinginformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit.

The receiving unit 50 is further configured to:

receive second configuration information; and

the processing unit 51 is further configured to configure, according tothe second configuration information, the terminal device to beincapable of simultaneously transmitting information in a time periodwhose duration is the first time unit and a time period whose durationis the second time unit.

The transmission unit 52 is further configured to stop transmitting thesecond information in the third time period, or discard the secondinformation.

The transmission unit 52 is further configured to:

transmit the second information in a J^(th) first time period after thesecond time period, where J is a positive integer greater than or equalto 1.

The receiving unit 50 is specifically configured to:

receive the first indication information in the first time period in afirst carrier; and

the transmission unit 52 is specifically configured to:

transmit the first information in the second time period in the firstcarrier or a second carrier.

The transmission unit 52 is further configured to:

transmit third notification information to the network device, where thethird notification information is used to notify the network device thatthe terminal device is capable of transmitting information in a timeperiod whose duration is the second time unit and capable of receivinginformation in a time period whose duration is the first time unit.

The receiving unit 50 is further configured to:

receive third configuration information; and

the processing unit 51 is further configured to configure, according tothe third configuration information, the terminal device to be capableof transmitting information in a time period whose duration is thesecond time unit and capable of receiving information in a time periodwhose duration is the first time unit.

The receiving unit 50 is further configured to:

receive third information in a time period whose duration is the firsttime unit.

The transmission unit 52 is further configured to:

transmit fourth notification information to the network device, wherethe fourth notification information is used to notify the network devicethat the terminal device is incapable of transmitting information in aplurality of uplink carriers.

The receiving unit 50 is further configured to:

receive fourth configuration information; and

the processing unit 51 is further configured to configure, according tothe fourth configuration information, the terminal device to be capableof transmitting information in a single uplink carrier.

Referring to FIG. 5B, an embodiment of the present disclosure furtherprovides a terminal device. The terminal device includes a receiver 500,a processor 510, and a transmitter 520.

The receiver 500 is configured to receive first indication informationin a first time period, where a duration of the first time period is afirst time unit.

The processor 510 is configured to trigger, according to the firstindication information, the transmitter 520 to transmit firstinformation in a second time period.

The transmitter 520 is configured to transmit the first information inthe second time period, where a duration of the second time period is asecond time unit, and a duration of the second time unit is greater thana duration of the first time unit.

An interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

Further, the receiver 500 is further configured to:

receive second indication information; and

the processor 510 is further configured to trigger the transmitter 520to transmit second information in a third time period, where a durationof the third time period is the first time unit, and at least one partor an entirety of the third time period overlaps the second time period.

Further, the transmitter 520 is further configured to:

transmit first notification information to a network device, where thefirst notification information is used to notify the network device thatthe terminal device is capable of simultaneously transmittinginformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit.

Further, the receiver 500 is further configured to:

receive first configuration information transmitted by the networkdevice; and

the processor 510 is further configured to configure the terminal deviceto be capable of simultaneously transmitting information in a timeperiod whose duration is the first time unit and a time period whoseduration is the second time unit.

The processor 510 is further configured to determine whether a sum of atransmit power of a first channel carrying the first information and atransmit power of a second channel carrying the second information isless than or equal to a first threshold, where the first threshold is amaximum transmit power value allowed by the terminal device;

the transmitter 520 is further configured to transmit the secondinformation in the third time period according to the second indicationinformation when the processor 510 determines that the sum of thetransmit power of the first channel carrying the first information andthe transmit power of the second channel carrying the second informationis less than or equal to the first threshold; and

the processor 510 is further configured to: when the processor 510determines that the sum of the transmit power of the first channelcarrying the first information and the transmit power of the secondchannel carrying the second information is greater than the firstthreshold, stop transmitting the second information in the third timeperiod; or discard the second information; or reduce the transmit powerof the second channel carrying the second information, and whendetermining that a reduction value of the transmit power of the secondchannel is less than a second threshold, use a reduced transmit power ofthe second channel to transmit the second information.

Further, the processor 510 is further configured to:

if the reduction value of the transmit power of the second channel isgreater than or equal to the second threshold, stop transmitting thesecond information in the third time period, or discard the secondinformation, where the second threshold is equal to the transmit powerof the second channel×T, and a value range of T is (0, 1).

Further, the transmitter 520 is further configured to:

transmit second notification information to a network device, where thesecond notification information is used to notify the network devicethat the terminal device is incapable of simultaneously transmittinginformation in a time period whose duration is the first time unit and atime period whose duration is the second time unit.

Further, the receiver 500 is further configured to:

receive second configuration information; and

the processor 510 is further configured to configure, according to thesecond configuration information, the terminal device to be incapable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

Further, the transmitter 520 is further configured to stop transmittingthe second information in the third time period, or discard the secondinformation.

Further, the transmitter 520 is further configured to:

transmit the second information in a J^(th) first time period after thesecond time period, where J is a positive integer greater than or equalto 1.

Optionally, the receiver 500 is specifically configured to:

receive the first indication information in the first time period in afirst carrier; and

the transmitter 520 is specifically configured to:

transmit the first information in the second time period in the firstcarrier or a second carrier.

Further, the transmitter 520 is further configured to:

transmit third notification information to the network device, where thethird notification information is used to notify the network device thatthe terminal device is capable of transmitting information in a timeperiod whose duration is the second time unit and capable of receivinginformation in a time period whose duration is the first time unit.

Further, the receiver 500 is further configured to:

receive third configuration information; and

the processor 510 is further configured to configure, according to thethird configuration information, the terminal device to be capable oftransmitting information in a time period whose duration is the secondtime unit and capable of receiving information in a time period whoseduration is the first time unit.

Further, the transmitter 520 is further configured to:

transmit fourth notification information to the network device, wherethe fourth notification information is used to notify the network devicethat the terminal device is incapable of transmitting information in aplurality of uplink carriers.

Further, the receiver 500 is further configured to:

receive fourth configuration information; and.

the processor 510 is further configured to configure, according to thefourth configuration information, the terminal device to be capable oftransmitting information in a single uplink carrier.

Referring to FIG. 6A, an embodiment of the present disclosure furtherprovides a network device. The network device includes a processing unit60 and a transmission unit 61.

The processing unit 60 is configured to determine first indicationinformation.

The transmission unit 61 is configured to transmit the first indicationinformation to a terminal device in a first time period, where aduration of the first time period is a first time unit, the firstindication information is used to trigger the terminal device totransmit first information in a second time period, a duration of thesecond time period is a second time unit, and a duration of the secondtime unit is greater than a duration of the first time unit.

An interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

The network device further includes a receiving unit 62, configured toreceive the first information transmitted by the terminal device in thesecond time period.

The transmission unit 61 is further configured to:

transmit second indication information to the terminal device, where thesecond indication information is used to trigger the terminal device totransmit second information in a third time period, a duration of thethird time period is the first time unit, and at least one part or anentirety of the third time period overlaps the second time period; and

the receiving unit 62 is further configured to:

receive the second information transmitted by the terminal device in thethird time period according to the second indication information, or thesecond information transmitted in a J^(th) first time unit after thesecond time period, where J is a positive integer greater than or equalto 1.

The network device further includes the receiving unit 62, configured toreceive first notification information transmitted by the terminaldevice; and

the processing unit 60 is further configured to determine, according tothe first notification information, that the terminal device is capableof simultaneously transmitting information in a time period whoseduration is the first time unit and a time period whose duration is thesecond time unit.

The transmission unit 61 is further configured to:

transmit first configuration information to the terminal device, wherethe first configuration information is used to configure the terminaldevice to be capable of simultaneously transmitting information in atime period whose duration is the first time unit and a time periodwhose duration is the second time unit.

The network device further includes a receiving unit 62, configured toreceive second notification information transmitted by the terminaldevice; and

the processing unit 60 is further configured to determine, according tothe second notification information, that the terminal device isincapable of simultaneously transmitting information in a time periodwhose duration is the first time unit and a time period whose durationis the second time unit.

The transmission unit 61 is further configured to:

transmit second configuration information to the terminal device, wherethe second configuration information is used to configure the terminaldevice to be incapable of simultaneously transmitting information in atime period whose duration is the first time unit and a time periodwhose duration is the second time unit.

The transmission unit 61 is specifically configured to:

transmit the first indication information to the terminal device in thefirst time period in a first carrier; and

the network device further includes the receiving unit 62, configured toreceive the first information in the second time period in the firstcarrier or a second carrier.

The network device further includes the receiving unit 62, configured toreceive third notification information transmitted by the terminaldevice; and

the processing unit 60 is further configured to determine, according tothe third notification information, that the terminal device is capableof transmitting information in a time period whose duration is thesecond time unit and capable of receiving information in a time periodwhose duration is the first time unit.

The transmission unit 61 is further configured to:

transmit third configuration information to the terminal device, wherethe third configuration information is used to configure the terminaldevice to be capable of transmitting information in a time period whoseduration is the second time unit and capable of receiving information ina time period whose duration is the first time unit.

The transmission unit 61 is further configured to:

transmit third information in the first time period.

The network device further includes the receiving unit 62, configured toreceive fourth notification information transmitted by the terminaldevice; and

the processing unit 60 is further configured to determine, according tothe fourth notification information, that the terminal device isincapable of transmitting information in a plurality of uplink carriers.

The transmission unit 61 is further configured to:

transmit fourth configuration information to the terminal device, wherethe fourth configuration information is used to configure the terminaldevice to be capable of transmitting information in a single uplinkcarrier.

The transmission unit 61 is further configured to:

transmit at least one of first configuration information, secondconfiguration information, or third configuration information to theterminal device, where the first configuration information is used toinstruct to configure only one uplink carrier for the terminal device,the second configuration information is used to instruct to configurethe terminal device to simultaneously transmit information in the secondtime period and the first time period, and the third configurationinformation is used to instruct to configure a duration of a time periodfor receiving information and a duration of a time period fortransmitting information by the terminal device to be different.

Referring to FIG. 6B, an embodiment of the present disclosure furtherprovides a network device. The network device includes a processor 600and a transmitter 610.

The processor 600 is configured to determine first indicationinformation.

The transmitter 610 is configured to transmit the first indicationinformation to a terminal device in a first time period, where aduration of the first time period is a first time unit, the firstindication information is used to trigger the terminal device totransmit first information in a second time period, a duration of thesecond time period is a second time unit, and a duration of the secondtime unit is greater than a duration of the first time unit.

An interval of K first time units exists between the second time periodand the first time period, K is a positive integer, a start position ofa first symbol of the second time period is the same as a start positionof a first symbol of a first subframe, and the first subframe is asubframe adjacent to a subframe including the first time period, or asubframe including a first time period which has an interval of K firsttime units with the first time period, or a subframe adjacent to asubframe including a first time period which has an interval of K firsttime units with the first time period.

Further, the network device further includes a receiver 620, configuredto receive the first information transmitted by the terminal device inthe second time period.

Further, the transmitter 610 is further configured to:

transmit second indication information to the terminal device, where thesecond indication information is used to trigger the terminal device totransmit second information in a third time period, a duration of thethird time period is the first time unit, and at least one part or anentirety of the third time period overlaps the second time period; and

the receiver 620 is further configured to:

receive the second information transmitted by the terminal device in thethird time period according to the second indication information, or thesecond information transmitted in a J^(th) first time unit after thesecond time period, where J is a positive integer greater than or equalto 1.

Further, the network device further includes the receiver 620,configured to receive first notification information transmitted by theterminal device; and

the processor 600 is further configured to determine, according to thefirst notification information, that the terminal device is capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.

Further, the transmitter 610 is further configured to:

transmit first configuration information to the terminal device, wherethe first configuration information is used to configure the terminaldevice to be capable of simultaneously transmitting information in atime period whose duration is the first time unit and a time periodwhose duration is the second time unit.

Further, the network device further includes a receiver 620, configuredto receive second notification information transmitted by the terminaldevice; and

the processor 600 is further configured to determine, according to thesecond notification information, that the terminal device is incapableof simultaneously transmitting information in a time period whoseduration is the first time unit and a time period whose duration is thesecond time unit.

Further, the transmitter 610 is further configured to:

transmit second configuration information to the terminal device, wherethe second configuration information is used to configure the terminaldevice to be incapable of simultaneously transmitting information in atime period whose duration is the first time unit and a time periodwhose duration is the second time unit.

Optionally, the transmitter 610 is specifically configured to:

transmit the first indication information to the terminal device in thefirst time period in a first carrier; and

the network device further includes the receiver 620, configured toreceive the first information in the second time period in the firstcarrier or a second carrier.

Further, the network device further includes the receiver 620,configured to receive third notification information transmitted by theterminal device; and

the processor 600 is further configured to determine, according to thethird notification information, that the terminal device is capable oftransmitting information in a time period whose duration is the secondtime unit and capable of receiving information in a time period whoseduration is the first time unit.

Further, the transmitter 610 is further configured to:

transmit third configuration information to the terminal device, wherethe third configuration information is used to configure the terminaldevice to be capable of transmitting information in a time period whoseduration is the second time unit and capable of receiving information ina time period whose duration is the first time unit.

Further, the network device further includes the receiver 620,configured to receive fourth notification information transmitted by theterminal device; and

the processor 600 is further configured to determine, according to thefourth notification information, that the terminal device is incapableof transmitting information in a plurality of uplink carriers.

Further, the transmitter 610 is further configured to:

transmit fourth configuration information to the terminal device, wherethe fourth configuration information is used to configure the terminaldevice to be capable of transmitting information in a single uplinkcarrier.

Persons skilled in the art should understand that the embodiments of thepresent disclosure may be provided as a method, a system, or a computerprogram product. Therefore, the present disclosure may use a form ofhardware only embodiments, software only embodiments, or embodimentswith a combination of software and hardware. Moreover, the presentdisclosure may use a form of a computer program product that isimplemented on one or more computer-usable storage media (including butnot limited to a disk memory, a CD-ROM, an optical memory, and the like)that include computer-usable program code.

The present disclosure is described with reference to the flowchartsand/or block diagrams of the method, the device (system), and thecomputer program product according to the embodiments of the presentdisclosure. It should be understood that computer program instructionsmay be used to implement each process and/or each block in theflowcharts and/or the block diagrams and a combination of a processand/or a block in the flowcharts and/or the block diagrams. Thesecomputer program instructions may be provided for a general-purposecomputer, a dedicated computer, an embedded processor, or a processor ofany other programmable data processing device to generate a machine, sothat the instructions executed by a computer or a processor of any otherprogrammable data processing device generate an apparatus forimplementing a specific function in one or more processes in theflowcharts and/or in one or more blocks in the block diagrams.

These computer program instructions may be stored in a computer readablememory that can instruct the computer or any other programmable dataprocessing device to work in a specific manner, so that the instructionsstored in the computer readable memory generate an artifact thatincludes an instruction apparatus. The instruction apparatus implementsa specific function in one or more processes in the flowcharts and/or inone or more blocks in the block diagrams.

These computer program instructions may be loaded onto a computer oranother programmable data processing device, so that a series ofoperations and steps are performed on the computer or the anotherprogrammable device, thereby generating computer-implemented processing.Therefore, the instructions executed on the computer or the anotherprogrammable device provide steps for implementing a specific functionin one or more processes in the flowcharts and/or in one or more blocksin the block diagrams.

Although some embodiments of the present disclosure have been described,persons skilled in the art can make changes and modifications to theseembodiments once they learn the basic inventive concept. Therefore, thefollowing claims are intended to be construed as to cover the preferredembodiments and all changes and modifications falling within the scopeof the present disclosure.

Obviously, persons skilled in the art can make various modifications andvariations to the embodiments of the present disclosure withoutdeparting from the spirit and scope of the embodiments of the presentdisclosure. The present disclosure is intended to cover thesemodifications and variations provided that they fall within the scope ofprotection defined by the following claims and their equivalenttechnologies.

What is claimed is:
 1. A data communication method, comprising:receiving, by a terminal device, first indication information in a firsttime period, wherein a duration of the first time period is a first timeunit, and the first indication information is used to trigger theterminal device to transmit first information in a second time period;and transmitting, by the terminal device, the first information in thesecond time period according to the first indication information,wherein a duration of the second time period is a second time unit, anda duration of the second time unit is a duration of one timeslot, aduration of the first time unit is less than a duration of one timeslot;wherein an interval of K first time units exists between the second timeperiod and the first time period, K is a positive integer.
 2. The methodaccording to claim 1, wherein a start position of a first symbol of thesecond time period is the same as a start position of a first symbol ofa first subframe, and the first subframe is one of: (1) a subframeadjacent to a subframe comprising the first time period, (2) a subframecomprising a first time period which has an interval of K first timeunits with the first time period, or (3) a subframe adjacent to asubframe comprising a first time period which has an interval of K firsttime units with the first time period.
 3. The method according to claim1, wherein before the transmitting, by the terminal device, the firstinformation in the second time period according to the first indicationinformation, the method further comprises: receiving, by the terminaldevice, second indication information, wherein the second indicationinformation is used to trigger the terminal device to transmit secondinformation in a third time period, wherein a duration of the third timeperiod is the first time unit, and wherein at least one part or anentirety of the third time period overlaps the second time period. 4.The method according to claim 2, wherein the method further comprises:transmitting, by the terminal device, first notification information,wherein the first notification information is used to notify a networkdevice that the terminal device is capable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit. 5.The method according to claim 3, wherein the method further comprises:transmitting, by the terminal device, second notification information,wherein the second notification information is used to notify a networkdevice that the terminal device is incapable of simultaneouslytransmitting information in a time period whose duration is the firsttime unit and a time period whose duration is the second time unit. 6.The method according to claim 1, wherein the method further comprises:transmitting, by the terminal device, third notification information,wherein the third notification information is used to notify the networkdevice that the terminal device is capable of transmitting informationin a time period whose duration is the second time unit and capable ofreceiving information in a time period whose duration is the first timeunit.
 7. The method according to claim 1, wherein the method furthercomprises: receiving, by the terminal device, second configurationinformation, wherein the second configuration information is used toconfigure the terminal device to be capable of transmitting informationin a time period whose duration is the second time unit and capable ofreceiving information in a time period whose duration is the first timeunit.
 8. A terminal device, comprising: a receiver, configured toreceive first indication information in a first time period, wherein aduration of the first time period is a first time unit; and a processor,configured to trigger, according to the first indication information, atransmitter to transmit first information in a second time period,wherein the transmitter is configured to transmit the first informationin the second time period, wherein a duration of the second time periodis a second time unit, and a duration of the second time unit is aduration of one timeslot, and a duration of the first time unit is lessthan a duration of one timeslot, and wherein an interval of K first timeunits exists between the second time period and the first time period, Kis a positive integer.
 9. The terminal device according to claim 8,wherein a start position of a first symbol of the second time period isthe same as a start position of a first symbol of a first subframe, andthe first subframe is one of: (1) a subframe adjacent to a subframecomprising the first time period, (2) a subframe comprising a first timeperiod which has an interval of K first time units with the first timeperiod, or (3) a subframe adjacent to a subframe comprising a first timeperiod which has an interval of K first time units with the first timeperiod.
 10. The terminal device according to claim 8, wherein thereceiver is further configured to receive second indication information;and the processor is further configured to trigger the transmitter totransmit second information in a third time period, wherein a durationof the third time period is the first time unit, and at least one partor an entirety of the third time period overlaps the second time period.11. The terminal device according to claim 8, wherein the transmitter isfurther configured to: transmit first notification information to anetwork device, wherein the first notification information is used tonotify the network device that the terminal device is capable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.
 12. The terminal device according to claim 10, wherein thetransmitter is further configured to: transmit second notificationinformation to a network device, wherein the second notificationinformation is used to notify the network device that the terminaldevice is incapable of simultaneously transmitting information in a timeperiod whose duration is the first time unit and a time period whoseduration is the second time unit.
 13. The terminal device according toclaim 8, wherein the transmitter is further configured to: transmitthird notification information to the network device, wherein the thirdnotification information is used to notify the network device that theterminal device is capable of transmitting information in a time periodwhose duration is the second time unit and capable of receivinginformation in a time period whose duration is the first time unit. 14.The terminal device according to claim 8, wherein the receiver isfurther configured to receive second configuration information; and theprocessor is further configured to configure, according to the secondconfiguration information, the terminal device to be capable oftransmitting information in a time period whose duration is the secondtime unit and capable of receiving information in a time period whoseduration is the first time unit.
 15. A network device, comprising: aprocessor, configured to determine first indication information; and atransmitter, configured to transmit the first indication information toa terminal device in a first time period, wherein a duration of thefirst time period is a first time unit, the first indication informationis used to trigger the terminal device to transmit first information ina second time period, a duration of the second time period is a secondtime unit, and a duration of the second time unit is a duration of onetimeslot, and a duration of the first time unit is less than a durationof one timeslot; wherein an interval of K first time units existsbetween the second time period and the first time period, K is apositive integer.
 16. The network device according to claim 15, whereina start position of a first symbol of the second time period is the sameas a start position of a first symbol of a first subframe, and the firstsubframe is one of: (1) a subframe adjacent to a subframe comprising thefirst time period, (2) a subframe comprising a first time period whichhas an interval of K first time units with the first time period, or (3)a subframe adjacent to a subframe comprising a first time period whichhas an interval of K first time units with the first time period. 17.The network device according to claim 15, further comprising a receiver,configured to receive the first information transmitted by the terminaldevice in the second time period.
 18. The network device according toclaim 17, wherein the transmitter is further configured to: transmitsecond indication information to the terminal device, wherein the secondindication information is used to trigger the terminal device totransmit second information in a third time period, a duration of thethird time period is the first time unit, and at least one part or anentirety of the third time period overlaps the second time period; andwherein the receiver is further configured to: receive the secondinformation transmitted by the terminal device in the third time periodaccording to the second indication information.
 19. The network deviceaccording to claim 15, further comprising the receiver, configured toreceive first notification information transmitted by the terminaldevice; wherein the processor is further configured to determine,according to the first notification information, that the terminaldevice is capable of simultaneously transmitting information in a timeperiod whose duration is the first time unit and a time period whoseduration is the second time unit.
 20. The network device according toclaim 18, further comprising a receiver, configured to receive secondnotification information transmitted by the terminal device; wherein theprocessor is further configured to determine, according to the secondnotification information, that the terminal device is incapable ofsimultaneously transmitting information in a time period whose durationis the first time unit and a time period whose duration is the secondtime unit.